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  • nitrogen  (321)
  • bic Book Industry Communication::J Society & social sciences::JN Education
  • Springer  (355)
  • American Chemical Society
  • American Institute of Physics (AIP)
  • Blackwell Publishing Ltd
  • 2020-2024  (36)
  • 1995-1999  (320)
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  • 1
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    Springer Nature | Springer
    Publication Date: 2022-03-16
    Description: This open access book includes a series of relevant policy research articles, elaborared in the framework of the “Quality in higher education: internationalisation and databases to enhance the Romanian education system” project, implemented by the Executive Agency for Higher Education, Research, Development and Innovation Funding (UEFISCDI), together with the Ministry of Education. The project aims to develop and implement systemic measures at tertiary education level, leading to an increased quality of the overall higher education system and universities better prepared for labour market requirements and international standards. The book focuses on areas of interest for Romanian higher education, such as systemic measures to improve access, participation and completion for (vulnerable) students, better promotion of the Romanian higher education to attract students, as well as instruments for a more efficient use of data at higher education level. Each article includes evidence-based policy proposals that could support new strategic initiatives in higher education, including new legislation. Additionally, the collection of articles tells a comprehensive story about the audacity of a higher education system which went through significant challenges to align itself with both European and international trends, as well as respond to national imperatives. Over the last three decades, since the fall of the Iron Curtain, Romanian higher education has undergone significant transformations, aiming to align itself to the latest developments and trends at European and international level. The National Law on Education no. 1/2011 has set the stage for a full implementation of the Bologna Process action lines, taking into account that Romania was already a part of the largest European intergovernmental process – currently the European Higher Education Area (EHEA) – as a founding member. However, since the adoption of this normative framework, the law suffered numerous amendments, making it challenging to observe and achieve coherence in its implementation. Furthermore, Romania is also currently redesigning the strategy for the alocation of European structural funds 2021-2027, based on two strategic documents - the new Education and Employment Operational Programme and the National Recovery and Resilience Plan which highlight the reform and investment priorities at a national level. At the same time, 2021 is a good time to analyze the level of implementation for the objectives and measures included in the National Strategy for Tertiary Education 2015-2020, the Europe 2020 Strategy, and the Bologna Process action lines in the 2010 – 2020 timeframe. Therefore, the present moment may be an important time to assess the impact of strategic documents and actions in the last decade and, possibly, to draft a new National Education Law, better adapted to current realities, starting from the recent initiative by the President of Romania – the Educated Romania strategic vision which was also politically assumed by the Romanian Government.
    Keywords: Romanian Higher Education ; Future Direction of European Higher Education ; Internationalization of Higher Education ; Digital Technology in Higher Education ; Educational Policy Romania ; European Policies Higher Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy
    Language: English
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  • 2
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This open access methodological book summarises existing analysing techniques using data from PIAAC, a study initiated by the OECD that assesses key cognitive and occupational skills of the adult population in more than 40 countries. The approximately 65 PIAAC datasets that has been published worldwide to date has been widely received and used by an interdisciplinary research community. Due to the complex structure of the data, analyses with PIAAC datasets are very challenging. To ensure the quality and significance of these data analyses, it is necessary to instruct users in the correct handling of the data. This methodological book provides a standardised approach to successfully implementing these data analyses. It contains examples of and tools for the analysis of the PIAAC data using different statistical approaches and software, and it offers perspectives from various disciplines. The contributing authors have hands-on experience of using PIAAC data, and/or they have conducted data analysis workshops with these data.
    Keywords: Assessment, Testing and Evaluation ; Statistics for Social Sciences, Humanities, Law ; Education Economics ; International and Comparative Education ; Education ; Statistics in Social Sciences, Humanities, Law, Education, Behavorial Sciences, Public Policy ; PIAAC data ; Large-scale assessment ; Data analysis ; Plausible values ; International comparison ; Key cognitive skills ; Literacy of adult population ; Numeracy of adult population ; Analysis with PIAAC datasets ; Stata ; R software ; Open access ; Education: examinations & assessment ; Social research & statistics ; Economics of specific sectors ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKD Examinations & assessment ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHB Sociology::JHBC Social research & statistics ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics ; bic Book Industry Communication::J Society & social sciences::JN Education
    Language: English
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  • 3
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This open access handbook brings together the latest research from a wide range of internationally influential scholars to analyze educational policy research from international, historical and interdisciplinary perspectives. By effectively breaking through the boundaries between countries and disciplines, it presents new theories, techniques and methods for contemporary education policy, and illustrates the educational policies and educational reform practices that various countries have introduced to meet the challenges of continuous change. This volume focuses on policies and changes in schools and classrooms. The studies on school changes present the differences in the policies and challenges of K-12 schools and universities in different countries and regions, and in connection with the contradictions and conflicts between tradition and modernization, as well as the changing roles of various stakeholders, especially that of teachers. In terms of curriculum and instruction, many countries have undertaken experiments and introduced changes based on two major themes: “what to teach” and “how to teach”. International education assessments represented by PISA not only promote the improvement and extensive application of educational assessment and testing techniques, but have also had far-reaching impacts on education policies and education reforms in many countries. Focusing on the changes in educational policies at the micro level, this volume comprehensively reveals the complex interactions between school organizations, teachers, curricula, teaching and learning, evaluation and other elements within the education system, as well as the latest related reforms worldwide. ; Brings together in a single volume a collection of international scholars from multiple disciplines Pushes the boundaries of education policy studies through its insightful analyses Equips readers to handle the complexities of policy research by employing critical thinking
    Keywords: Educational Policy and Politics ; International and Comparative Education ; International assessments ; Globalization and educational reform ; International cooperation ; International "agents" in modernizing ; Educational change ; The politics of education ; International/ transnational studies ; Historical studies ; Cultural diversity ; Regional differences ; Open Access ; Educational strategies & policy ; Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education
    Language: English
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  • 4
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This open access book explores the transformative experiences of participants in the University of Sydney’s National Centre for Cultural Competence (NCCC) programs. The establishment of the NCCC was viewed as a critical point of departure for developing an institution-wide agenda of cultural competence. The NCCC’s work since its inception reflects efforts to lay important foundations for cultural change at the University. With the ultimate aim of establishing cultural competence as an agent for transformational change and social justice education, the NCCC has steadily expanded its research and teaching work both within and beyond the University of Sydney. Further, it has developed foundational resources to support and encourage University staff to integrate cultural competence philosophy and pedagogy in their curricula, teaching and research. This includes the ability to engage meaningfully with the cultures, histories and contemporary issues in Aboriginal and Torres Strait Islander communities. The NCCC programs have been designed to encourage participants to learn about who they are and how they can positively impact the transformational change the University has begun. The book presents participants’ reflections on their experiences at the organisational and personal level. Readers will gain insights into a range of topics including cultural competence, communities of practice, policy implementation, and transformative leadership at the interface between higher education and professional lives.
    Keywords: Higher Education ; Sociology of Education ; Educational Policy and Politics ; Education Policy ; Cultural competence in the higher education sector ; Transformative leadership in professional development programs ; Intercultural capabilities for academic and professional staff ; cultural competence for academic and professional staff ; Cultural competence embedded in professional lives ; transformative nature of professional development programs ; building communities of practice ; policy implementation in the higher education sector ; critical reflection and transformative leadership ; learning cultural competence ; best practices for professional development programs ; culturally competent organisational wide ; Open Access ; Higher & further education, tertiary education ; Education ; Social research & statistics ; Educational strategies & policy ; Central / national / federal government policies ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPQ Central government::JPQB Central government policies
    Language: English
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  • 5
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This Open Access book is about the development of a common understanding of environmental citizenship. It conceptualizes and frames environmental citizenship taking an educational perspective. Organized in four complementary parts, the book first explains the political, economic and societal dimensions of the concept. Next, it examines environmental citizenship as a psychological concept with a specific focus on knowledge, values, beliefs and attitudes. It then explores environmental citizenship within the context of environmental education and education for sustainability. It elaborates responsible environmental behaviour, youth activism and education for sustainability through the lens of environmental citizenship. Finally, it discusses the concept within the context of different educational levels, such as primary and secondary education in formal and non-formal settings. Environmental citizenship is a key factor in sustainability, green and cycle economy, and low-carbon society, and an important aspect in addressing global environmental problems. It has been an influential concept in many different arenas such as economy, policy, philosophy, and organizational marketing. In the field of education, the concept could be better exploited and established, however. Education and, especially, environmental discourses in science education have a great deal to contribute to the adoption and promotion of environmental citizenship.
    Keywords: Science Education ; Sustainable Development ; Social Justice, Equality and Human Rights ; Environmental and Sustainability Education ; Environmental Social Sciences ; Human Rights ; Sustainability / sustainable development ; Environmental citizenship ; Environmental citizen ; Environmental education ; Education for environmental citizenship ; Education for sustainability ; ENEC ; EU Horizon 2020 ; EU-roadmap 2050 ; European Network for Environmental Citizenship ; Environmental Behavior ; Environmental citizenship from educational perspective ; Open Access ; Teaching of a specific subject ; Science: general issues ; Sustainability ; Politics & government ; Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNU Teaching of a specific subject ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RN The environment::RNU Sustainability ; bic Book Industry Communication::J Society & social sciences::JP Politics & government ; bic Book Industry Communication::J Society & social sciences::JN Education
    Language: English
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  • 6
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This Open Access book presents an international group of scholars seeking to understand how youth from different cultures relate to modern multidimensional concepts of citizenship, and the roles that education and society have in shaping the views of the world’s future citizens. The book also explores how different aspects of citizenship, such as attitudes towards diverse population groups and concerns for social issues, relate to classical definitions of norm-based citizenship from the political sciences. Authors from Asia, Europe, and Latin America provide a series of in-depth investigations into how concepts of “good citizenship” are shaped in different regions of the globe, using the rich comparative data from the IEA’s International Civic and Citizenship Study (ICCS) 2016. In twelve chapters, the authors review the concept of “good citizenship”; how citizenship norms adherence is configured into profiles across countries; and what country, school, and background factors are related to how students adhere to citizenship norms. Recognizing contingent social and political situations in specific regions of the world, the present books offer six chapters where authors apply their expertise to offer locally relevant and pertinent observations on how young people from diverse cultures understand and relate to different dimensions of citizenship in countries of Asia, Europe, and Latin America. The present book is of relevance for different audiences interested in civic education and political socialization, including social sciences and education, integrating topics from political science, sociology, political psychology, and law.
    Keywords: IEA ; Large-scale studies in education ; Open Access ; Civic education ; School effectiveness ; International Civics and Citizenship Study ; ICCS ; Large-scale assessment ; ICCS data in civic education ; Comparative research in civic education ; Latin American political culture and citizenship norms ; Corruption among students in Latin America ; Citizenship norms among native and immigrant students ; Asian adolescents’ understanding of democracy ; Asian dtudents and civic engagement ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKD Examinations & assessment ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPV Political control & freedoms::JPVH Human rights::JPVH1 Civil rights & citizenship ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JND Educational systems and structures::JNDH Education: examinations and assessment ; thema EDItEUR::J Society and Social Sciences::JP Politics and government::JPV Political control and freedoms::JPVC Civics and citizenship ; thema EDItEUR::J Society and Social Sciences::JN Education::JNF Educational strategies and policy
    Language: English
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  • 7
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: *THIS BOOK WILL SOON BECOME AVAILABLE AS OPEN ACCESS BOOK* This book is an excellent synthesis of the initial and continuing preparation for Mathematics Teaching in Colombia, Costa Rica, Dominican Republic and Venezuela, from which comparative analyses can be made that show similarities and differences, and highlight various perspectives. In August 2012, a workshop of the Capacity and Networking Project (CANP) of the International Commission on Mathematical Instruction (ICMI) was held in Costa Rica. This CANP brought together for two weeks a group of 66 Mathematics educators, mathematicians, university administrators, and elementary and secondary teachers from Colombia, Venezuela, the Dominican Republic, Panamá and Costa Rica. The goal was to promote progress in Mathematics Education in the region; as such it was a unique experience in the region. One of the most important results of this event was the creation of the Mathematics Education Network of Central America and the Caribbean (REDUMATE). It was organized by persons associated with the Mathematics Education Reform Project in Costa Rica (responsible for the most outstanding and innovative curriculum reform in Latin America) and the Inter-American Committee on Mathematics Education (IACME), which is an official regional multinational organization affiliate of ICMI. This book brings to the international Educational Community an important collection of experiences and ideas in the Mathematics Education of four countries of a region within the heart of the American continent, a region that has been many times forgotten. The dissemination of these results can promote the search for international collaborative actions in a wider scale.
    Keywords: Mathematics Education ; International and Comparative Education ; Education Policy ; Mathematics Teacher Preparation in Central America ; Mathematics Education in Central America and the Caribean ; Mathematics Teachers in Latin America ; Capacity and Networking Project CANP ; REDUMATE ; Mathematics Education Reform Project Costa Rica ; IACME ; Mathematics Education Colombia ; Mathematics Education Dominican Republic ; Mathematics Education Costa Rica ; Mathematics Education Venezuela ; Teaching of a specific subject ; Mathematics ; Education ; Central / national / federal government policies ; bic Book Industry Communication::J Society & social sciences::JN Education::JNU Teaching of a specific subject ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPQ Central government::JPQB Central government policies ; thema EDItEUR::J Society and Social Sciences::JN Education::JNU Teaching of a specific subject ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JP Politics and government::JPQ Central / national / federal government::JPQB Central / national / federal government policies
    Language: English
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  • 8
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    Springer Nature | Springer
    Publication Date: 2022-05-02
    Description: This open access book takes a critical and international perspective to the mainstreaming of the Global Citizenship Concept and analyses the key issues regarding global citizenship education across the world. In that respect, it addresses a pressing need to provide further conceptual input and to open global citizenship agendas to diversity and indigeneity. Social and political changes brought by globalisation, migration and technological advances of the 21st century have generated a rise in the popularity of the utopian and philosophical idea of global citizenship. In response to the challenges of today’s globalised and interconnected world, such as inequality, human rights violations and poverty, global citizenship education has been invoked as a means of preparing youth for an inclusive and sustainable world. In recent years, the development of global citizenship education and the building of students’ global citizenship competencies have become a focal point in global agendas for education, international educational assessments and international organisations. However, the concept of global citizenship education still remains highly contested and subject to multiple interpretations, and its operationalisation in national educational policies proves to be challenging. This volume aims to contribute to the debate, question the relevancy of global citizenship education’s policy objectives and to enhance understanding of local perspectives, ideologies, conceptions and issues related to citizenship education on a local, national and global level. To this end, the book provides a comprehensive and geographically based overview of the challenges citizenship education faces in a rapidly changing global world through the lens of diversity and inclusiveness. ;
    Keywords: International and Comparative Education ; Social Justice, Equality and Human Rights ; Sociology of Education ; Environmental and Sustainability Education ; Educational Policy and Politics ; Human Rights ; Global social justice in education ; Global Citizenship Education GCE ; Preparing youth for a sustainable world ; 2030 Agenda for Sustainable Development ; United Nations ; Citizenship education ; Intercultural education ; Multicultural education ; Education for sustainable development ; Education for social justice ; Global competence ; International educational policies ; UNESCO ; Open Access ; Education ; Politics & government ; Social research & statistics ; Sustainability ; Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JP Politics & government ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy
    Language: English
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  • 9
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This open access book explores cultural competence in the higher education sector from multi-disciplinary and inter-disciplinary perspectives. It addresses cultural competence in terms of leadership and the role of the higher education sector in cultural competence policy and practice. Drawing on lessons learned, current research and emerging evidence, the book examines various innovative approaches and strategies that incorporate Indigenous knowledge and practices into the development and implementation of cultural competence, and considers the most effective approaches for supporting cultural competence in the higher education sector. This book will appeal to researchers, scholars, policy-makers, practitioners and general readers interested in cultural competence policy and practice.
    Keywords: Higher Education ; Educational Policy and Politics ; Ethnicity in Education ; Sociology of Education ; open access ; Indigenous higher education ; student equity ; student transition ; higher education policy ; Indigenous research ; community engagement ; cultural competency policy and practices ; developing cultural competency in higher education ; implementing cultural competency in higher education ; culturally competent leadership ; culturally responsive pedagogy ; diversity, social justice, equity and inclusion ; culturally competent service learning ; Higher & further education, tertiary education ; Educational strategies & policy ; Education ; Sociology ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHB Sociology ; thema EDItEUR::J Society and Social Sciences::JN Education::JNM Higher education, tertiary education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNF Educational strategies and policy ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JH Sociology and anthropology::JHB Sociology
    Language: English
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  • 10
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This open access handbook brings together the latest research from a wide range of internationally influential scholars to analyze educational policy research from international, historical and interdisciplinary perspectives. By effectively breaking through the boundaries between countries and disciplines, it presents new theories, techniques and methods for contemporary education policy, and illustrates the educational policies and educational reform practices that various countries have introduced to meet the challenges of continuous change. Based on an analysis of the nature of education policy and education reform, this volume focuses on education reform and the concept of education quality. Adopting a historical and comparative perspective, it examines the dialectical relationship between education policy and education reform in various countries, assesses theoretical and practical issues in the process of moving from regulation to multiple governance in contemporary education administration, and explores the impact of globalization on national education reform and the interdependence between countries. In addition, it presents studies addressing educational policy research methodology from multiple perspectives. Highlighting the changes in national education macro policies, this volume comprehensively reveals the complex relationship between contemporary education reform and social change, and explores the links between contemporary social, political and economic systems and educational policy research and practice, offering a holistic portrait of macro trends in contemporary education reform. ; Brings together in a single volume a collection of international scholars from multiple disciplines Pushes the boundaries of education policy studies through its insightful analyses Equips readers to handle the complexities of policy research by employing critical thinking
    Keywords: Educational Policy and Politics ; International and Comparative Education ; Policy studies ; Educational reforms ; Educational research ; Educational knowledge ; Educational change ; The politics of education ; Contextual factors ; Policy analyses ; Policy process ; Public policy ; Open Access ; Educational strategies & policy ; Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education
    Language: English
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  • 11
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This open access edited volume is a comparative effort to discern the short-term educational impact of the covid-19 pandemic on students, teachers and systems in Brazil, Chile, Finland, Japan, Mexico, Norway, Portugal, Russia, Singapore, Spain, South Africa, the United Kingdom and the United States. One of the first academic comparative studies of the educational impact of the pandemic, the book explains how the interruption of in person instruction and the variable efficacy of alternative forms of education caused learning loss and disengagement with learning, especially for disadvantaged students. Other direct and indirect impacts of the pandemic diminished the ability of families to support children and youth in their education. For students, as well as for teachers and school staff, these included the economic shocks experienced by families, in some cases leading to food insecurity and in many more causing stress and anxiety and impacting mental health. Opportunity to learn was also diminished by the shocks and trauma experienced by those with a close relative infected by the virus, and by the constrains on learning resulting from students having to learn at home, where the demands of schoolwork had to be negotiated with other family necessities, often sharing limited space. Furthermore, the prolonged stress caused by the uncertainty over the resolution of the pandemic and resulting from the knowledge that anyone could be infected and potentially lose their lives, created a traumatic context for many that undermined the necessary focus and dedication to schoolwork. These individual effects were reinforced by community effects, particularly for students and teachers living in communities where the multifaceted negative impacts resulting from the pandemic were pervasive. This is an open access book.
    Keywords: Open Access ; Education and Covid-19 ; Educational Inequality ; Education Disruption ; Education Policy ; Education Technology ; Comparative Education ; Remote learning ; Schooling during a pandemic ; Distance teaching ; post-pandemic educational policies ; Homeschooling during Pendemic ; understanding Inequities in Instruction and Learning ; Education in the times of Covid-19 ; Unequal Impacts of COVID-19 ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education::JNZ Study & learning skills: general ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNF Educational strategies and policy ; thema EDItEUR::J Society and Social Sciences::JN Education::JNZ Study and learning skills: general ; thema EDItEUR::J Society and Social Sciences::JN Education::JNK Educational administration and organization
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  • 12
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This book is a collection of short essays, accessible through open access, which takes the interested reader on a tour across the global higher education landscape. It addresses pertinent themes and challenges in higher education. To mark the 70th anniversary of the International Association of Universities (IAU) and its role in higher education since 1950, experts from around the world share their insights into higher education’s recent past, present and future. The book is divided into six parts: Part I – “70 years of Higher Education Cooperation and Advocacy” looks back at key events in IAU’s history, its mission and significant activities over time, and remarks on the current global context informing its quest to promote academic partnerships and solidarity on a global scale. Part II – “Facilitating International Cooperation” provides for different perspectives on the transformation of the internationalisation of higher education and the contribution of higher education to international cooperation. Part III – “Coding the Values” debates the values upon which higher education was, is and will have to be built to provide for a democratic and inclusive society. Part IV – “The Changing Landscape” analyses various aspects of the transformation of higher education in an evolving context across the globe. Part V – “The Promise of Education” reflects on the role of higher education, its ideals and shortfalls and what it must do to stay true to its promise to help shape our societies. Part VI – “Opening up – The Future of Higher Education” focuses on future scenarios of higher education and call on the reader to envision a different kind of higher education and reimagine the contribution of higher education to society, as well as future roles for the IAU. The book will be of interest to higher education policy makers and academics. It is also of interest to the general public, as it provides a comprehensive overview of the challenges higher education institutions currently face and suggests scenarios of what the future of education might look like.
    Keywords: Open access ; International Association of Universities ; Relevance and value of higher education ; Fundamental principles of higher education ; International co-operation for higher education ; Changing landscape of universities ; IAU principles ; 70 years of IAU ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; thema EDItEUR::J Society and Social Sciences::JN Education::JNM Higher education, tertiary education ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNF Educational strategies and policy
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  • 13
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This open access book describes and reviews the development of the quality control mechanisms and methodologies associated with IEA’s extensive program of educational research. A group of renowned international researchers, directly involved in the design and execution of IEA’s international large-scale assessments (ILSAs), describe the operational and quality control procedures that are employed to address the challenges associated with providing high-quality, comparable data. Throughout the now considerable history of IEA’s international large-scale assessments, establishing the quality of the data has been paramount. Research in the complex multinational context in which IEA studies operate imposes significant burdens and challenges in terms of the methodologies and technologies that have been developed to achieve the stated study goals. The demands of the twin imperatives of validity and reliability must be satisfied in the context of multiple and diverse cultures, languages, orthographies, educational structures, educational histories, and traditions. Readers will learn about IEA’s approach to such challenges, and the methods used to ensure that the quality of the data provided to policymakers and researchers can be trusted. An often neglected area of investigation, namely the consequential validity of ILSAs, is also explored, examining issues related to reporting, dissemination, and impact, including discussion of the limits of interpretation. The final chapters address the question of the influence of ILSAs on policy and reform in education, including a case study from Singapore, a country known for its outstanding levels of achievement, but which nevertheless seeks the means of continual improvement, illustrating best practice use of ILSA data.
    Keywords: Education, general ; Educational Policy and Politics ; International and Comparative Education ; Curriculum Studies ; Assessment and Testing ; Open Access ; International large-scale assessments ; Educational policy ; IEA ; Comparative education ; Educational measurement ; International education ; Research methods in international large-scale assessment ; Comparative Studies of Student Achievement ; ILSA ; IEA’s approach to international large-scale assessments ; Education ; Educational strategies & policy ; Curriculum planning & development ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKC Curriculum planning & development
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  • 14
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    Springer Nature | Springer
    Publication Date: 2022-08-18
    Description: This open access book focuses on making the transition from in-person, classroom education to other feasible alternative modes and methodologies to deliver education at all levels. The book presents and analyzes research questions to explore in this arena, including pedagogical issues relating to technological and infrastructure challenges, teacher professional development, issues of disparity, access and equity, and impact of government policies on education. It also provides unique opportunities and vehicles for generating scholarship that helps explain the varied educational needs, perspectives and solutions that arise during an emergency and the different roles educational institutions and educators may play during this time. Developed from a highly successful Presidential Session at the annual meeting of the Association for Educational Communications and Technology (AECT), this edited volume presents AECT and its membership as the premier organization focusing on the provision of educational communications and technology leadership. In addition, it functions as a contemporary document of this global crisis as well as a rich resource for possible future emergency scenarios in the educational arena.
    Keywords: COVID-19 ; Pedagogical issues ; Technological and infrastructure challenges ; AECT 2020 virtual convention ; Teacher professional development ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education::JNMT Teacher training
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  • 15
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This open access international scientific study provides an analysis of how the educational strategy of Universal Design for Learning can stimulate the process of inclusive education in different educational-cultural contexts and different areas of the educational system. The findings of the research deepen the conception of inclusive education and present an analysis of factors that are significant for developing the educational system as well as providing evidence-based recommendations for educational practice. The research for this work was done in four European countries with various historical-cultural contexts: Lithuania and Poland underwent a transformation of the educational systems at the turning point in their political system, shifting from a strictly centralized Soviet policy to a liberal and democratic education system; Austria has experienced changes in social stratification and a need for cultural harmonisation arising from active national migration processes, whereas Finland has been gradually developing a socio-democratic model of national welfare. The analysis of the educational processes in the four countries has been performed using a qualitative action research method. The researchers, in cooperation with the teachers from the selected schools in their country, have implemented the strategy of Universal Design for Learning and assessed its transformation indicators in terms of the quality of inclusive education components.
    Keywords: Open Access ; globalisation ; migration ; educational inclusion ; self-regulated learning ; neuroscience ; re-interpretation of inclusive education ; action research strategy ; Modern School Education in Poland ; Teaching-Learning Process ; Polish language, mathematics and history teaching ; Validation of the Action Research Model ; Purposeful and Motivated Student ; Knowledgeable and Resourceful Student ; pupil’s learning barriers ; Strategic and Goal-Directed Student ; Observation of the educational process ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNF Educational strategies and policy
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  • 16
    Publication Date: 2021-02-10
    Description: This Open Access book summarizes the key findings from the second cycle of IEA’s International Computer and Information Literacy Study (ICILS), conducted in 2018. ICILS seeks to establish how well schools around the globe are responding to the need to provide young people with the necessary digital participatory competencies. Effective use of information and communication technologies (ICT) is an imperative for successful participation in an increasingly digital world. ICILS 2018 explores international differences in students’ computer and information literacy (CIL), namely their ability to use computers to investigate, create, and communicate at home, at school, in the workplace, and in the community. Participating countries also had an option to administer an assessment of students’ computational thinking (CT), focused on their ability to recognize aspects of real-world problems appropriate for computational formulation, and to evaluate and develop algorithmic solutions to those problems, so that the solutions could be operationalized with a computer. The data collected by ICILS 2018 show how digital competencies can be assessed using instruments representing authentic contexts for ICT use, and how students’ CIL and CT skills relate to school learning experiences, out-of-school contexts, and student characteristics. Those data also show how learning technologies are used in classrooms around the world. Background questionnaires asked students about their use of ICT, and collected information from teachers, schools, and national education systems about the resourcing and teaching of CIL (and CT) within their countries. The results of ICILS 2018 will enable policymakers and education systems to develop a better understanding of the contexts and outcomes of CIL (and CT) education programs.
    Keywords: Assessment, Testing and Evaluation ; Technology and Digital Education ; Computers and Education ; International and Comparative Education ; Education ; Assessment of computer and information literacy ; CIL ; Computer and Information Literacy ; Digital competence ; Education on computer and information literacy ; Educational quality and progress ; ICILS assessment framework ; ICT literacy ; IEA ; IEA Amsterdam ; Int'l Association for the Evaluation of Educational Achievement ; International computer and information literacy study ; Policy and practice in CIL education ; Students’ engagement with ICT ; Young people’s participation in the digital age ; ICILS 2018 ; Students’ computer and information literacy achievement ; Open Access ; Education: examinations & assessment ; Educational equipment & technology, computer-aided learning (CAL) ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKD Examinations & assessment ; bic Book Industry Communication::J Society & social sciences::JN Education::JNV Educational equipment & technology, computer-aided learning (CAL) ; bic Book Industry Communication::J Society & social sciences::JN Education
    Language: English
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  • 17
    Publication Date: 2024-03-29
    Description: This book is about the ways in which experiments can be employed in the context of research on learning technologies and child–computer interaction (CCI). It is directed at researchers, supporting them to employ experimental studies while increasing their quality and rigor. The book provides a complete and comprehensive description on how to design, implement, and report experiments, with a focus on and examples from CCI and learning technology research. The topics covered include an introduction to CCI and learning technologies as interdisciplinary fields of research, how to design educational interfaces and visualizations that support experimental studies, the advantages and disadvantages of a variety of experiments, methodological decisions in designing and conducting experiments (e.g. devising hypotheses and selecting measures), and the reporting of results. As well, a brief introduction on how contemporary advances in data science, artificial intelligence, and sensor data have impacted learning technology and CCI research is presented. The book details three important issues that a learning technology and CCI researcher needs to be aware of: the importance of the context, ethical considerations, and working with children. The motivation behind and emphasis of this book is helping prospective CCI and learning technology researchers (a) to evaluate the circumstances that favor (or do not favor) the use of experiments, (b) to make the necessary methodological decisions about the type and features of the experiment, (c) to design the necessary “artifacts” (e.g., prototype systems, interfaces, materials, and procedures), (d) to operationalize and conduct experimental procedures to minimize potential bias, and (e) to report the results of their studies for successful dissemination in top-tier venues (such as journals and conferences). This book is an open access publication.
    Keywords: Experimental studies ; Child-Computer Interaction ; Learning Technology ; User studies ; Methodological decisions ; CCI ; HCI ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::U Computing & information technology::UY Computer science::UYZ Human-computer interaction::UYZG User interface design & usability ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYZ Human–computer interaction::UYZG User interface design and usability
    Language: English
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  • 18
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This Open Access book features a school development model (Arizona Initiative for Leadership Development and Research – AZiLDR) that offers a roadmap for schools to navigate the complexities of continuous school development. Filled with processes that balance evidence-based values with democratic, culturally responsive values, this book offers strategies to mediate the tensions and to address school culture, context and values, leadership capacity, using data as a source of reflection, curricular and pedagogical activity, and strengths-based approaches to meeting the needs of culturally diverse students. You will find: · - Active, reflective activities · - Case studies illustrating each concept · - The research base supporting each concept · - Descriptions of processes from other contexts (South Carolina, Germany, Australia, Sweden) · - Thoughts about next steps for contextually sensitive and multi-level school development · - Suggestions for cross-national dialogue and research within the Zone of Uncertainty Use this ideal source to guide school leadership teams in creating productive schools that continually grow!
    Keywords: leadership development ; Leadership teams ; Leadership capacity ; School improvement ; Leadership coaching ; open access ; Culturally responsive schooling ; Evidence-based policy ; Multi-level leadership ; International school development ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKC Curriculum planning & development ; thema EDItEUR::J Society and Social Sciences::JN Education::JNK Educational administration and organization ; thema EDItEUR::J Society and Social Sciences::JN Education::JNF Educational strategies and policy ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JND Educational systems and structures::JNDG Curriculum planning and development
    Language: English
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  • 19
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This open access book offers a comparative study of eight ambitious national reforms that sought to create opportunities for students to gain the necessary breath of skills to thrive in a rapidly changing world. It examines how national governments transform education systems to provide students opportunities to develop such skills. It analyses comprehensive education reforms in Brazil, Finland, Japan, Mexico, Peru, Poland, Portugal and Russia and yields original and important insights on the process of educational change. The analysis of these 21st century skills reforms shows that reformers followed approaches which are based on the five perspectives: cultural, psychological, professional, institutional and political. Most reforms relied on institutional and political perspectives. They highlight the systemic nature of the process of educational change, and the need for alignment and coherence among the various elements of the system in order. They underscore the importance of addressing the interests of various stakeholders of the education system in obtaining the necessary impetus to initiate and sustain change. In contrast, as the book shows, the use of a cultural and psychological frame proved rarer, missing important opportunities to draw on systematic analysis of emerging demands for schools and on cognitive science to inform the changes in the organization of instruction. Drawing on a rich array of sources and evidence the book provides a careful account of how education reform works in practice.
    Keywords: International and Comparative Education ; Educational Policy and Politics ; Curriculum Studies ; Administration, Organization and Leadership ; Open Access ; transformation of public education systems ; role of curriculum ; Deeper Learning ; Twenty first century skills ; Socio-emotional development ; education reform ; Education Policy ; Education Leadership ; Systemic educational change ; Comparative education ; Education in Finland ; Education in Japan ; Education in Brazil ; Education in Mexico ; Education in Poland ; Education in Russia ; Education in Peru ; Education in Portugal ; Education ; Educational strategies & policy ; Curriculum planning & development ; Educational administration & organization ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKC Curriculum planning & development ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education
    Language: English
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  • 20
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This open access book identifies the multiple ways that IEA’s studies of civic and citizenship education have contributed to national and international educational discourse, research, policymaking, and practice. The IEA International Civic and Citizenship Education Study (ICCS), first conducted in 2009, was followed by a second cycle in 2016. The project was linked to the earlier IEA Civic Education Study (CIVED 1999, 2000). IEA’s ICCS remains the only large-scale international study dedicated to formal and informal civic and citizenship education in school. It continues to make substantial contributions to understanding the nature of the acquired civic knowledge, attitudes, and participatory skills. It also discusses in-depth how a wide range of countries prepare their young people for citizenship in changing political, social, and economic circumstances. The next cycle of ICCS is planned for 2022. In this book, more than 20 national representatives and international scholars from Europe, Latin America, Asia, and North America assess how the processes and findings of the 2009 and 2016 cycles of ICCS and CIVED 1999/2000 have been used to improve nations’ understanding of their students’ civic knowledge, beliefs, attitudes, current civic-related behaviors, and intentions for future participation in a comparative context. There are also chapters summarizing the secondary analysis of those studies’ results indicating their usefulness for educational improvement and reflecting on policy issues. The analyses and reflections in this book provide timely insight into international educational discourse, policy, practice, and research in an area of education that is becoming increasingly important for many societies.
    Keywords: Educational Policy and Politics ; Education, general ; Citizenship Education ; Assessment and Testing ; Open Access ; Citizenship education policies ; Impact of large-scale studies in civic and citizenship education ; Challenges for civic and citizenship education ; Moral education ; Social interactions at school ; Social media use for civic engagement ; Attitudes towards issues in society ; Civic knowledge and understanding ; Attitudes toward immigrants ; Cross-curricular approaches ; Political socialization ; Adolescents’ socialization ; Agents of socialization ; IEA Civic Education Study (CIVED) ; IEA International Civic and Citizenship Study (ICCS) ; European civic education ; Citizenship study and teaching ; Political participation ; Latin American civic education ; Educational strategies & policy ; Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNF Educational strategies and policy ; thema EDItEUR::J Society and Social Sciences::JN Education
    Language: English
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  • 21
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This open access book addresses how to help students find purpose in a rapidly changing world. In a probing and visionary analysis of the field of global education Fernando Reimers explains how to lead the transformation of schools and school systems in order to more effectively prepare students to address today’s’ most urgent challenges and to invent a better future. Offering a comprehensive and multidimensional framework for designing and implementing a global education program that combines cultural, psychological, professional, institutional and political perspectives the book integrates an extensive body of empirical literature on the practice of global education. It discusses several global citizenship curricula that have been adopted by schools and school networks, and ties them into an approach to lead school change into the uncharted territory of the future. Given its scope, the book will help teachers, school and district leaders tackle the change management needed in order to introduce global education, and more generally increase the relevancy of education. In addition, the book offers a “bridge” for more productive collaboration and communication between those who lead the process of educational change, and those who study and theorize this important work. At a time when the urgency of our shared global challenges calls for more understanding and collaboration and when the rapid transformation of societies requires that we help students develop a clear sense of relevancy and purpose, this book offers a way to pursue deep and sustainable change in instruction and school culture, so that students learn that nothing human is foreign and that they can find meaning in lives aligned with audacious purposes to make the world better.
    Keywords: Curriculum Studies ; Educational Policy and Politics ; Learning & Instruction ; Education Policy ; Sociology of Education ; 21st century skills ; global education ; multicultural education ; deeper learning ; immigrant students ; diversity and education ; teaching diverse students ; framework for global education ; global citizenship education ; global citizenship curriculum ; leading transformation of schools ; internationalization of education ; school reform ; school change ; school leadership ; open access ; Curriculum planning & development ; Educational strategies & policy ; Teaching skills & techniques ; Cognition & cognitive psychology ; Central / national / federal government policies ; Sociology ; Education ; Social research & statistics ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKC Curriculum planning & development ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education::JNT Teaching skills & techniques ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPQ Central government::JPQB Central government policies ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHB Sociology ; bic Book Industry Communication::J Society & social sciences::JN Education
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  • 22
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This Open Access book analyses the past, present and future of the technical university as a single faculty independent institution. The point of departure is a view of changing academic realities, through which the identity as a technical university is challenged and reconstituted. More specifically, the book connects the development of technical universities to changes in the structure and dimensioning of national higher education systems, to changes in the disciplinary basis of academic research and to changes in the governance of higher education institutions. Introduced in the age of industrialization, polytechnical schools rose to prominence in many national settings during the second half of the 19th century. Over time, new technologies have been developed and incorporated into the repertoire, and waves of academisation have swept over the former polytechnics, transforming them into technical universities. Their traditions and brands, however, prevail. Several technical universities are included among the most prestigious academic institutions of their nations and the training of engineers and engineering research still enjoys a high level of prestige and national priority, e.g. in the context of innovation and industrial policy. But the world keeps changing, and the higher education sector with it. Will technical universities have an equally attractive position within university systems in the decades to come?
    Keywords: Higher Education ; History of Education ; International and Comparative Education ; Administration, Organization and Leadership ; Organization and Leadership ; historical perspective of technical universities ; polytechnical universities ; external pressure at technical universities ; university governance regimes ; engineering academisation ; professional values in engineering education ; identity formation at technical universities ; university-industry interaction ; university merger process ; double degree programmes in engineering and education ; Open Access ; Higher & further education, tertiary education ; History of education ; Education ; Educational administration & organization ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNB History of education ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education
    Language: English
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  • 23
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This open access book examines the educational conditions that support cultures of exploration in kindergartens. It conceptualises cultures of exploration, whether those cultures are created through children’s own engagement or are demanded of them through undertaking specific tasks within different institutional settings. It shows how the conditions for children’s exploration form a web of activities in different settings with social relationships, local landscapes and artefacts. The book builds on the understanding of cultural traditions as deeply implicated in the developmental processes, meaning that local considerations must be reflected in education for sustainable futures. Therefore the book examines and conceptualises exploration and cultural formation through locally situated cases and navigates toward global educational concepts. The book provides different windows into how children may explore in everyday practice settings in kindergarten, and contributes to a loci-based, ecological, integral knowledge relevant for early childhood education.
    Keywords: Early Childhood Education ; Infancy and Early Childhood Development ; International and Comparative Education ; Child and School Psychology ; Clinical Psychology ; School Psychology ; children's learning and development through exploration ; exploration in kindergarten ; children's transcendence to school learning ; "glocal" pedagogy ; froebel and explorative education ; cultural-historical concept of playground activities ; children and teachers as musical explorers ; cultural formation ; dialogical engagement ; children's play and learning activity ; inclusion and exclusion ; pedagogical hybridity through Froebel ; Open Access ; Early childhood care & education ; Child, developmental & lifespan psychology ; Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNL Schools::JNLA Pre-school & kindergarten ; bic Book Industry Communication::J Society & social sciences::JM Psychology::JMC Child & developmental psychology ; bic Book Industry Communication::J Society & social sciences::JN Education
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  • 24
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This open access book addresses the growing trend in the field of early childhood education and care (ECEC) research named collaborative knowledge building in which researchers and ECEC personnel collaborate. This kind of research encompasses a number of approaches, such as design studies, action studies, Learning Studies, Lesson Studies, and combined research and development studies. There are important differences between these approaches, but they also share some features, which makes it possible to see them as examples of a particular tradition of knowledge building. Collaborative knowledge building constitutes close ties between developing practices of early childhood education and care, and generating empirically grounded theoretical knowledge. This book contributes to the methodology of practices-developing research by mapping this movement through exemplifying themes actualised in such studies, and through conceptualizing important and recurring gains and challenges. It also describes how the latter can be taken on.
    Keywords: practice-developing research ; researcher-teacher collaborative knowledge building ; inter-professions collaboration ; practice based mathematics education research ; toddlers’ mathematical development in Swedish preschools ; metacognitive approach to children’s learning ; Research-practice collaboration ; Competence development ; preschool education for immigrant children ; knowledge creating practices in partnership research ; Play-responsive teaching ; practice-based research ; foundational ethos of collaboration ; participatory-driven creative learning ; teachers as agents in the research process ; interprofessional dialogue (MIROR) ; de-reifying language in research ; bic Book Industry Communication::J Society & social sciences::JN Education::JNL Schools::JNLA Pre-school & kindergarten ; bic Book Industry Communication::J Society & social sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNL Schools and pre-schools::JNLA Pre-school and kindergarten ; thema EDItEUR::J Society and Social Sciences::JN Education
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  • 25
    Publication Date: 2021-02-10
    Description: This open access Springer Brief provides a systematic analysis of current trends and requirements in the areas of knowledge and competence in the context of the project “(A) Higher Education Digital (AHEAD)—International Horizon Scanning / Trend Analysis on Digital Higher Education.” It examines the latest developments in learning theory, didactics, and digital-education technology in connection with an increasingly digitized higher education landscape. In turn, this analysis forms the basis for envisioning higher education in 2030. Here, four learning pathways are developed to provide a glimpse of higher education in 2030: Tamagotchi, a closed ecosystem that is built around individual students who enter the university soon after secondary education; Jenga, in which universities offer a solid foundation of knowledge to build on in later phases; Lego, where the course of study is not a monolithic unit, but consists of individually combined modules of different sizes; and Transformer, where students have already acquired their own professional identities and life experiences, which they integrate into their studies. In addition, innovative practice cases are presented to illustrate each learning path.
    Keywords: Higher Education ; Organization ; International and Comparative Education ; Business and Management ; Higher education systems ; Learning pathways ; Education organizations ; Practical case studies in education ; New didactics and learning theories ; Knowledge in a Digitalized World ; Digital learning ; Open Access ; Higher & further education, tertiary education ; Organizational theory & behaviour ; Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education ; bic Book Industry Communication::K Economics, finance, business & management::KJ Business & management::KJU Organizational theory & behaviour ; bic Book Industry Communication::J Society & social sciences::JN Education
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  • 26
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: *THIS BOOK WILL SOON BE AVAILABLE AS OPEN ACCESS BOOK* This book is an excellent synthesis of the initial and continuing preparation for Mathematics Teaching in Bolivia, Ecuador, Paraguay and Peru, from which comparative analyses can be made that show similarities and differences, and highlight various perspectives. In February 2016, the 5th Capacity and Networking Project (CANP) workshop of the International Commission on Mathematical Instruction (ICMI) was held in Lima, Peru. The coordination of this two-week workshop was undertaken by an international scientific committee (IPC), with equal participation by mathematicians and mathematics educators from the region and from the international ICMI and IMU community. The goal of CANP5 was to improve the quality of mathematics education in the region, which led to the main theme of the scientific program “Initial and Continued Teacher Education”. Country Reports on the main theme of teacher education systems for each country in this region were presented and discussed to detect common issues that might be improved through a collaborative network. One of the most important results of this event was the creation of a Mathematics Education Network, namely the Comunidad de Educación Matemática de America del Sur – CEMAS. This book brings to the international Educational Community an important collection of experiences and ideas in the Mathematics Education of four Latin-American countries in the developing Andean region and Paraguay. The dissemination of these results can promote the search for international collaborative actions in a wider scale.
    Keywords: Mathematics Education ; Teaching and Teacher Education ; International and Comparative Education ; Curriculum Studies ; CANP5 ICMI ; Mathematics teacher education Bolivia ; Mathematics teacher education Ecuador ; Mathematics teacher education Paraguay ; Mathematics teacher education Peru ; Teacher preparation Andean region ; Cultural differences mathematics education ; CANP/ICMI/CDC-IMU reports on Teacher education ; Issues of curriculum development in developing countries ; Professional development of school teachers in Latin America ; Teaching of a specific subject ; Mathematics ; Teacher training ; Education ; Curriculum planning & development ; bic Book Industry Communication::J Society & social sciences::JN Education::JNU Teaching of a specific subject ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education::JNMT Teacher training ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKC Curriculum planning & development
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  • 27
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    Springer Nature | Springer
    Publication Date: 2022-08-18
    Description: This open access book reviews evidence and case studies on the effects of outdoor learning on teachers and learners. It shows how real-world learning outside the classroom contributes to unlocking the full potential of learners, demonstrating its benefits for academic learning, social competencies, personal and emotional development, psychological well-being, and physical activity and health. In addition, the book highlights how outdoor learning nurtures environmental awareness and helps learners to tackle current sustainability challenges. Its focus on high-quality learning makes it a unique contribution to the implementation of SDG 4. Aimed at lecturers at teacher training universities, teachers, professional educators, coaches, and multipliers who train staff of educational NGOs, as well as decision makers on all levels of education systems, this book is of interest to all those who seek a more in-depth understanding of the future of education.
    Keywords: Outdoor-based learning ; high-quality learning ; place-based learning ; experiential learning ; environmental education ; outdoor education ; education outside the classroom (EOtC) ; TEACHOUT research project ; Outdoor Learning and Children’s Eyesight ; Impacts on health and wellbeing from outdoor learning ; Teacher’s competences for teaching outside the classroom ; Nature-Based Learning ; Childhood nature connection ; School-based outdoor learning ; SDG 4 ; Sustainable Development Goals 4 ; bic Book Industry Communication::W Lifestyle, sport & leisure::WS Sports & outdoor recreation::WSD Sports training & coaching ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNU Teaching of a specific subject ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RG Geography::RGC Human geography
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  • 28
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This open access book is a result of an extensive, ambitious and wide-ranging pan-European project focusing on the development of children and young people’s cultural literacy and what it means to be European in the 21st century prioritising intercultural dialogue and mutual understanding. The Horizon 2020 funded, 3-year DIalogue and Argumentation for cultural Literacy Learning (DIALLS) project included ten partners from countries in and around Europe with the aim to centralise co-constructive dialogue as a main cultural literacy value and to promote tolerance, empathy and inclusion. This is achieved through teaching children in schools from a young age to engage together in discussions where they may have differing viewpoints or perspectives, to enable a growing awareness of their own cultural identities, and those of others. Central to the project is children’s engagement with wordless picture books and films, which are used as stimuli for discussions around core cultural themes such as social responsibility, living together and sustainable development. In order to enable intercultural dialogue in action, the project developed an online platform as a tool for engagement across classes, and which this book elaborates on. The book explores themes underpinning this unique interdisciplinary project, drawing together scholars from cultural studies, civics education and linguistics, psychologists, socio-cultural literacy researchers, teacher educators and digital learning experts. Each chapter of the book explores a theme that is common to the project, and celebrates its interdisciplinarity by exploring these themes through different lenses.
    Keywords: Educational Psychology ; Literature, general ; Early Childhood Education ; Teaching and Teacher Education ; Cross Cultural Psychology ; Sociology of Education ; Literature and Cultural Studies ; Cultural Psychology ; Cultural Literacy ; DIALLS project ; Cultural awareness in education ; Cultural identity in education ; Intercultural dialogue ; Intercultural curricula ; Children's development of dialogue and argumentation ; Inclusive education ; Educating cultural literacy ; European culture ; Open Access ; Biography, Literature & Literary studies ; Early childhood care & education ; Teacher training ; Social, group or collective psychology ; Education ; Social research & statistics ; bic Book Industry Communication::J Society & social sciences::JN Education::JNC Educational psychology ; bic Book Industry Communication::D Literature & literary studies ; bic Book Industry Communication::J Society & social sciences::JN Education::JNL Schools::JNLA Pre-school & kindergarten ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education::JNMT Teacher training ; bic Book Industry Communication::J Society & social sciences::JM Psychology::JMH Social, group or collective psychology ; bic Book Industry Communication::J Society & social sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNC Educational psychology ; thema EDItEUR::D Biography, Literature and Literary studies ; thema EDItEUR::J Society and Social Sciences::JN Education::JNL Schools and pre-schools::JNLA Pre-school and kindergarten ; thema EDItEUR::J Society and Social Sciences::JN Education::JNM Higher education, tertiary education::JNMT Teacher training ; thema EDItEUR::J Society and Social Sciences::JM Psychology::JMH Social, group or collective psychology ; thema EDItEUR::J Society and Social Sciences::JN Education
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  • 29
    Publication Date: 2024-03-29
    Description: This book is about scientific inquiry. Designed for early and mid-career researchers, it is a practical manual for conducting and communicating high-quality research in (mathematics) education. Based on the authors’ extensive experience as researchers, as mentors, and as members of the editorial team for the Journal for Research in Mathematics Education (JRME), this book directly speaks to researchers and their communities about each phase of the process for conceptualizing, conducting, and communicating high-quality research in (mathematics) education. In the late 2010s, both JRME and Educational Studies in Mathematics celebrated 50 years of publishing high-quality research in mathematics education. Many advances in the field have occurred since the establishment of these journals, and these anniversaries marked a milestone in research in mathematics education. Indeed, fifty years represents a small step for human history but a giant leap for mathematics education. The educational research community in general (and the mathematics education community in particular) has strongly advocated for original research, placing great emphasis on building knowledge and capacity in the field. Because it is an interdisciplinary field, mathematics education has integrated means and methods for scientific inquiry from multiple disciplines. Now that the field is gaining maturity, it is a good time to take a step back and systematically consider how mathematics education researchers can engage in significant, impactful scientific inquiry.
    Keywords: Research questions ; Hypotheses ; Theoretical framework ; Scientific inquiry ; Robust methods ; Interpretation of findings ; Pilot study ; Unexpected findings ; Continuous improvement ; Communicating research ; Learning opportunities ; Impact on practice ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNZ Study & learning skills: general ; bic Book Industry Communication::J Society & social sciences::JN Education::JNU Teaching of a specific subject ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNZ Study and learning skills: general ; thema EDItEUR::J Society and Social Sciences::JN Education::JNU Teaching of a specific subject
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  • 30
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    Springer Nature | Springer
    Publication Date: 2022-03-16
    Description: This open access book provides an analysis of contemporary societies and schools shaped by cultural diversity, globalization and migration. This diversity is necessarily reflected in education systems and requires the promotion of intercultural approaches able to improve learning processes and the quality of education. From an international and comparative perspective, this book first presents theoretical and conceptual foundations for seriously considering cultural diversity. The book also compares intercultural approaches and debates generated in countries as diverse as the United States, Canada, Brazil, Switzerland and France. For each national context, the book addresses both the historical roots of intercultural approaches and the concrete initiatives driven by educational policies for their implementation in schools and classrooms. Finally, the book presents discussions surrounding the treatment of linguistic or religious diversity in schools, the emergence of global citizenship education and the key role of teachers in intercultural approaches. This is an open access book.
    Keywords: Multicultural Education ; Intercultural Education ; Diversity in Education ; Ethnic Groups in Education ; Racism and Education ; Ethnocentrism in Education ; Integration and Education ; Assimilation through Education ; Social Justice and Education ; United States and Intercultural Education ; Canada and Intercultural Education ; France and Intercultural Education ; Switzerland and Intercultural Education ; Brazil and Intercultural Education ; Bilingual Education ; Multilingualism and Education ; Religious Diversity ; Global Citizenship Education ; Teacher Education ; Open Access ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education
    Language: English
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  • 31
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: *THIS BOOK WILL SOON BE AVAILABLE AS OPEN ACCESS BOOK* This book is a valuable resource for policymakers and practitioners as it brings insights mainly from developing countries where relatively less research activity takes place. It is also a valuable resource for courses in mathematics education in the teacher education colleges, and departments of education in the sub-Saharan Africa region. In the increasingly global and technological world mathematics is seen as a significant gatekeeper of opportunities for social and economic advancement and mobility. Hence, countries and development agencies in the broader sub-Saharan Africa region are looking towards increasing access to relevant and high-quality secondary education as a lever towards economic development. Policy makers and other key decision makers in education look towards improvement in mathematics teaching and learning as a key focus in education reform. In the East Africa region also a number of initiatives have been taken at the national level in the respective countries to improve the quality of mathematics education. This book provides an in-depth comparative analysis of the developments and issues in mathematics education in Kenya, Tanzania, Rwanda and Uganda, and advances our understanding of the state of secondary mathematics education in East Africa.
    Keywords: Mathematics Education ; International and Comparative Education ; Education Policy ; Mathematics curriculum developmen ; Mathematics education in sub-Saharan Africa ; Challenges in teaching and learning mathematics ; Harmonizing mathematics education in diverse settings ; State of mathematics education in sub-Saharan Africa ; Potentials in sub-Saharan African math education ; Pitfalls in sub-Saharan African math education ; Teaching of a specific subject ; Mathematics ; Education ; Central / national / federal government policies ; bic Book Industry Communication::J Society & social sciences::JN Education::JNU Teaching of a specific subject ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPQ Central government::JPQB Central government policies
    Language: English
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  • 32
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: AI (Artificial Intelligence) is predicted to radically change teaching and learning in both schools and industry causing radical disruption of work. AI can support well-being initiatives and lifelong learning but educational institutions and companies need to take the changing technology into account. Moving towards AI supported by digital tools requires a dramatic shift in the concept of learning, expertise and the businesses built off of it. Based on the latest research on AI and how it is changing learning and education, this book will focus on the enormous opportunities to expand educational settings with AI for learning in and beyond the traditional classroom. This open access book also introduces ethical challenges related to learning and education, while connecting human learning and machine learning. This book will be of use to a variety of readers, including researchers, AI users, companies and policy makers.
    Keywords: artificial intelligence ; life-long learning ; tutoring ; virtual learning ; learning analytics ; well-being ; simulations ; games ; intelligent digital tools ; deep learning ; robotics ; human-machine interaction ; bic Book Industry Communication::J Society & social sciences::JM Psychology ; bic Book Industry Communication::U Computing & information technology::UB Information technology: general issues ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::H Humanities::HP Philosophy::HPM Philosophy of mind ; bic Book Industry Communication::U Computing & information technology::UY Computer science::UYQ Artificial intelligence ; thema EDItEUR::J Society and Social Sciences::JM Psychology ; thema EDItEUR::U Computing and Information Technology::UB Information technology: general topics ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTM Philosophy of mind ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYQ Artificial intelligence
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  • 33
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    Springer Nature | Springer
    Publication Date: 2021-02-10
    Description: This open access book presents a comparative study on how large-scale professional development programs for teachers are designed and implemented. Around the world, governments and educators are recognizing the need to educate students in a broad range of higher order cognitive skills and socio-emotional competencies, and providing effective opportunities for teachers to develop the expertise needed to teach these skills is a crucial aspect of effective implementation of curricula which include those goals. This study examines how large-scale efforts to empower teachers for deeper instruction have been designed, how they have been implemented, and their outcomes. To do so, it investigates six programs from England, Colombia, Mexico, India, and the United States. Though all six are intended to broaden and deepen students’ curricular aspirations, each takes this expansion of curricular goals in a different direction. The ambitious education reforms studied here explicitly focus on building teachers’ capacity to teach on a broader set of goals. Through a discerning analysis of program documents, evaluations, and interviews with senior leaders and participants in the programs, the book identifies the various theories of action used in these programs, examines how they were implemented, and discusses what they achieved. As such, it offers an indispensable resource for education leaders interested in designing and implementing professional development programs for teachers that are aligned with ambitious instructional goals.
    Keywords: Teaching and Teacher Education ; Educational Policy and Politics ; Curriculum Studies ; Education Policy ; Sociology of Education ; open access ; large scale professional development programs ; Teacher education and deeper learning ; Teacher education and twenty first century skills ; supporting teacher knowledge development ; supporting teacher pedagogical development ; designing teacher professional development ; implementing teacher professional development ; National education reforms and teacher professional development ; Comparative teacher education ; Mastery Math reform in England ; District based teacher professional development ; Teacher professional development in Colombia ; Teacher Professional development Mexico ; Teacher professional development in India ; Teacher professional development in Cambodia ; Teacher professional development in USA ; Teacher training ; Educational strategies & policy ; Curriculum planning & development ; Central / national / federal government policies ; Sociology ; Education ; Social research & statistics ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education::JNMT Teacher training ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKC Curriculum planning & development ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPQ Central government::JPQB Central government policies ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHB Sociology ; bic Book Industry Communication::J Society & social sciences::JN Education
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  • 34
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: Based on twenty case studies of universities worldwide, and on a survey administered to leaders in 101 universities, this open access book shows that, amidst the significant challenges caused by the COVID-19 pandemic, universities found ways to engage with schools to support them in sustaining educational opportunity. In doing so, they generated considerable innovation, which reinforced the integration of the research and outreach functions of the university. The evidence suggests that universities are indeed open systems, in interaction with their environment, able to discover changes that can influence them and to change in response to those changes. They are also able, in the success of their efforts to mitigate the educational impact of the pandemic, to create better futures, as the result of the innovations they can generate. This challenges the view of universities as “ivory towers” being isolated from the surrounding environment and detached from local problems. As they reached out to schools, universities not only generated clear and valuable innovations to sustain educational opportunity and to improve it, this process also contributed to transform internal university processes in ways that enhanced their own ability to deliver on the third mission of outreach.
    Keywords: Open Access ; Higher Education Leadership ; educational innovation ; Leading learning during crises ; pandemic of 2020 ; university teaching during COVID-19 ; educational continuity ; online platforms for students and teachers ; Professional development ; Instructional resources ; socio-emotional support to students ; Organizational learning and innovation ; Engaging university students during COVID-19 ; educational impact of the pandemic ; school system during the COVID-19 pandemic in Chile ; Elementary and Secondary Learning during COVID-19 in China ; basic and secondary education in Colombia during the pandemic ; distance learning for K12 education in Japan ; upper-secondary education during the pandemic ; University - K12 collaboration during the pandemic in Turkey ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNF Educational strategies & policy ; bic Book Industry Communication::J Society & social sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNM Higher education, tertiary education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNK Educational administration and organization ; thema EDItEUR::J Society and Social Sciences::JN Education::JNF Educational strategies and policy ; thema EDItEUR::J Society and Social Sciences::JN Education
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  • 35
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    Springer Nature | Springer
    Publication Date: 2024-03-29
    Description: This open access book provides a comprehensive and informative overview of the current state of research about student perceptions of and student feedback on teaching. After presentation of a new student feedback process model, evidence concerning the validity and reliability of student perceptions of teaching quality is discussed. This is followed by an overview of empirical research on the effects of student feedback on teachers and instruction in different contexts, as well as on factors promoting the successful implementation of feedback in schools. In summary, the findings emphasize that student perceptions of teaching quality can be a valid and reliable source of feedback for teachers. The effectiveness of student feedback on teaching is significantly related to its use in formative settings and to a positive feedback culture within schools. In addition, it is argued that the effectiveness of student feedback depends very much on the support for teachers when making use of the feedback. As this literature review impressively documents, teachers in their work - and ultimately students in their learning - can benefit substantially from student feedback on teaching in schools. “This book reviews what we know about student feedback to teachers. It is detailed and it is a pleasure to read. To have these chapters in one place – and from those most up to date with the research literature and doing the research - is a gift.” John Hattie
    Keywords: Student Perception of Teaching Quality ; Student Feedback ; Teacher Development ; Teacher Professionalization ; School Accountability ; School Assessments ; School Improvement ; Teacher Education ; Student Perception for Development of Education ; Student Voice ; Student Ratings of Instruction ; Student Ratings of Classroom Climate ; Classroom Observation Measures ; Teaching Effectiveness ; Teaching Quality in Primary School ; Student Surveys ; Data Use in Schools ; Open Access ; bic Book Industry Communication::J Society & social sciences::JN Education::JNK Organization & management of education::JNKD Examinations & assessment ; bic Book Industry Communication::J Society & social sciences::JN Education::JNM Higher & further education, tertiary education::JNMT Teacher training ; bic Book Industry Communication::J Society & social sciences::JN Education ; bic Book Industry Communication::J Society & social sciences::JN Education::JNT Teaching skills & techniques ; thema EDItEUR::J Society and Social Sciences::JN Education::JND Educational systems and structures::JNDH Education: examinations and assessment ; thema EDItEUR::J Society and Social Sciences::JN Education::JNM Higher education, tertiary education::JNMT Teacher training ; thema EDItEUR::J Society and Social Sciences::JN Education ; thema EDItEUR::J Society and Social Sciences::JN Education::JNT Teaching skills and techniques
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  • 36
    Publication Date: 2023-12-12
    Description: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Infrared spectroscopy in the visible to near‐infrared (vis–NIR) and mid‐infrared (MIR) regions is a well‐established approach for the prediction of soil properties. Different data fusion and training approaches exist, and the optimal procedures are yet undefined and may depend on the heterogeneity present in the set and on the considered scale. The objectives were to test the usefulness of partial least squares regressions (PLSRs) for soil organic carbon (SOC), total carbon (C〈sub〉t〈/sub〉), total nitrogen (N〈sub〉t〈/sub〉) and pH using vis–NIR and MIR spectroscopy for an independent validation after standard calibration (use of a general PLSR model) or using memory‐based learning (MBL) with and without spiking for a national spectral database. Data fusion approaches were simple concatenation of spectra, outer product analysis (OPA) and model averaging. In total, 481 soils from an Austrian forest soil archive were measured in the vis–NIR and MIR regions, and regressions were calculated. Fivefold calibration‐validation approaches were carried out with a region‐related split of spectra to implement independent validations with n ranging from 47 to 99 soils in different folds. MIR predictions were generally superior over vis–NIR predictions. For all properties, optimal predictions were obtained with data fusion, with OPA and spectra concatenation outperforming model averaging. The greatest robustness of performance was found for OPA and MBL with spiking with 〈italic toggle="no"〉R〈/italic〉〈sup〉2〈/sup〉 ≥ 0.77 (N), 0.85 (SOC), 0.86 (pH) and 0.88 (C〈sub〉t〈/sub〉) in the validations of all folds. Overall, the results indicate that the combination of OPA for vis–NIR and MIR spectra with MBL and spiking has a high potential to accurately estimate properties when using large‐scale soil spectral libraries as reference data. However, the reduction of cost‐effectiveness using two spectrometers needs to be weighed against the potential increase in accuracy compared to a single MIR spectroscopy approach.〈/p〉
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Keywords: ddc:631.4 ; data fusion ; independent validation ; infrared spectroscopy ; MBL ; nitrogen ; outer product analysis ; pH ; soil organic carbon ; spiking ; total carbon
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  • 37
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    Entomologia experimentalis et applicata 86 (1998), S. 175-182 
    ISSN: 1570-7458
    Keywords: Aleyrodidae ; greenhouse whitefly ; nitrogen ; host selection ; oviposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tomato plants, Lycopersicon esculentum Miller cv 'Tres Cantos', were supplied with high (308 ppm), medium (140 ppm) and low (84 ppm) nitrogen doses in order to determine the influence of nitrogen fertilization on feeding and oviposition site selection by greenhouse whitefly adults, T. vaporariorum (Westwood). The nitrogen and water content was higher in plants supplied with 308 N ppm than in plants with medium or low nitrogen doses and no differences were found in soluble sugar content. The leaves of the upper plant stratum (leaves 1–5) had the greatest nitrogen and water content, independent of the nitrogen dose applied. The plants were exposed to T. vaporariorum adults into a greenhouse under two current (late autumn-winter and spring-early summer) situations of the tomato crop in the Mediterranean area. The distribution of whitefly adults on the plants was affected by the nitrogen dose in both experimental conditions, the number of adults was higher on the plants supplied with high nitrogen dose. Within plants, adult distribution was affected by leaf position, the upper plant stratum being preferred for feeding. Whitefly females selected for oviposition and laid more eggs on plants and leaves of plants with higher nitrogen and water contents. We conclude that whitefly host selection for feeding and ovipositing are related to differences in nitrogen and water content of the host plant.
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  • 38
    ISSN: 1570-7458
    Keywords: fecundity ; host plant quality ; Pistia stratiotes ; Spodoptera pectinicornis ; nitrogen ; trichomes ; oviposition ; biological control of weeds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We determined the influence of larval host quality of the floating aquatic weed Pistia stratiotes L. (Araceae) on the fecundity and egg distribution of the biological control agent Spodoptera pectinicornis (Hampson) (Lepidoptera: Noctuidae). Different nutritional levels were produced by growing plants with relatively low and high levels of nitrogen, phosphorus and potassium fertilizer. Female and male pupal biomass were significantly greater when the larvae were fed leaves from the high fertilizer plants. Although the fertilizer treatments did not significantly influence total fecundity, there was an indirect effect as adults from larger pupae were more fecund. Regardless of treatment, ovipositing females formed a depression in the leaf surface by removing trichomes into which they deposited the egg masses. Most of the egg masses were laid on the lower leaf surface, on leaf positions 5–8 (counting from the young inner to the outer leaves) and during days 1–2 post-eclosion. Most of the eggs were laid in masses but about 12% were solitary. Females fed the low fertilizer treatment laid a greater proportion (mean ± s.e.) of their eggs as solitary eggs (17.3 ± 3.4% of total eggs) than did females fed the high fertilizer treatment (8.3 ± 2.3% of total eggs). The increased percentage of solitary eggs laid by the females from the low quality larval diet may be an adaptive response to decrease competition among the progeny.
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  • 39
    ISSN: 1570-7458
    Keywords: Bemisia argentifolii ; Encarsia formosa ; poinsettia ; parasitoids ; nitrogen ; tri-trophic level interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract More wasps of Encarsia formosa Gahan (Hymenoptera: Aphelinidae) were found on fertilized poinsettias, Euphorbia pulcherrima (Willd.) (Euphorbiaceae), than on non-fertilized plants. Parasitization of Bemisia argentifolii Bellows & Perring (Homoptera: Aleyrodidae) by E. formosa was higher on plants treated with calcium nitrate than with ammonium nitrate or on control plants. In a no-choice test, host feeding by E. formosa was higher when hosts were on fertilized plants than when hosts were on control plants. The nitrogen content of whitefly pupae reared on plants treated with ammonium nitrate was higher than those on calcium nitrate-treated plants. Variability in the parasitization of B. argentifolii by E. formosa appears to be due to host plant-mediated differences in the whiteflies. E. formosa may be influenced by the nutritional suitability of the host, which influences whether wasps continue to oviposit, feed, or disperse.
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  • 40
    ISSN: 1570-7458
    Keywords: Brassica rapa ; B. juncea ; consumption rate ; glucosinolates ; growth rate ; indolyl ; isothiocyanate ; Mamestra configurata ; nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mamestra configurata (Walker) (Lep., Noctuidae) larvae were fed excisedBrassica juncea (commercial brown mustard) orB. rapa cv. Tobin (Canola) foliage of three plant growth stages-rosette (stage 2), stem elongation (stage 3) and flowering (stage 4). Relative consumption rates (RCRi) were not significantly different between the plant species. Within theB. juncea treatments, there were no significant growth stage differences in RCRi. However, withinB. rapa, RCRi increased with advancing plant growth stage. Larvae fedB. juncea foliage had significantly reduced relative growth rates (RGRi) compared to larvae fedB. rapa foliage. Within theB. juncea treatments, RGRi decreased with advancing plant growth stage. There were no significant growth stage differences in RGRi in theB. rapa treatments. RGRi was inversely proportional to the levels of isothiocyanate-releasing glucosinolates in theB. juncea treatments. RCRi was inversely proportional to the levels of indolyl glucosinolates in theB. rapa treatments. Levels of total phenols and catechols inB. juncea did not show any trend which could be related to growth stage effects in the insect nutritional indices. InB. rapa, levels of phenols and catechols in stage 3 and 4 foliage were lower than that of stage 2 foliage. Analyses of total nitrogen in field-grown plants showed reductions in percent nitrogen from rosette to flowering stage foliage. The response ofM. configurata to different growth stages of its host plants are discussed in relation to changing levels of allelochemicals and nitrogen.
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  • 41
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    Entomologia experimentalis et applicata 92 (1999), S. 205-216 
    ISSN: 1570-7458
    Keywords: Samea multiplicalis ; Spodoptera pectinicornis ; Pistia stratiotes ; waterlettuce ; nitrogen utilization efficiency ; compensatory feeding ; nitrogen ; biological control of weeds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Compensatory responses of caterpillars fed low quality food include increased consumption and utilization of essential nutrients. Information about an insect's responses to nutritional challenges from their host plants could benefit weed biological control efforts in the selection and establishment of new agents. The target weed, Pistia stratiotes L. (Araceae) is a floating aquatic plant that has relatively low nitrogen levels which are further diluted with high water content. Efforts to establish the insect Spodoptera pectinicornis (Hampson) (Lepidoptera: Noctuidae) for biological control of P. stratiotes could benefit by examining the nutritional responses of a similar widely established lepidopteran species, Samea multiplicalis (Guenèe) (Lepidoptera: Pyralidae). Larvae of this species were fed leaves of P. stratiotes plants that had been fertilized (NPK) at high and low rates. The leaves of the fertilized plants had a 4.3-fold increase in nitrogen (dry weight) and a 1.6-fold increase in water content. The results suggest that no compensatory increases occurred in larvae fed leaves from the low fertilized plants as no changes were found in fresh mass consumption or nitrogen utilization efficiency. Consequently, development time from second-third instars to pupation was delayed about 3 days compared with larvae fed the high nitrogen leaves. Furthermore, consumption of nitrogen was only 30% and its accumulation into larval tissues was only 60% compared with the larvae fed the high fertilized leaves. The resulting larvae had both a final biomass and a growth rate that were reduced by 40%. Regardless of plant fertilizer level, the larvae fed at a rate 5–10 times greater than that of similar lepidopteran species consuming either low or high quality diets, suggesting that the S. multiplicalis larvae may be functioning at their biological limit for ingesting food.
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  • 42
    ISSN: 1570-7458
    Keywords: Coleoptera ; bruchidae ; anesthesia ; carbon dioxide ; nitrogen ; cold ; oviposition and mating
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of anesthetizing with carbon dioxide, nitrogen, or low temperature on the reproductive behavior and fecundity of Callosobruchus subinnotatus was investigated. Males and females anesthetized with N2 as virgins had shorter recovery time, copulated earlier, and had shorter mating time than those subjected to CO2 or low temperature. Exposure of males and females to 2.0±0.5 °C for 10 min had the most profound effect on the recovery periods, copulation time, and duration of mating. Adults anesthetized with CO2 and low temperature laid fewer eggs than those anesthetized with N2. Females were more affected than males by the treatments, except when males were chilled for 10 min, and this prolonged the time for commencement of mating. The mode of anesthesia could affect egg production because vitellogenesis and choriogenesis take place in the imago stage of bruchids.
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  • 43
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    Entomologia experimentalis et applicata 77 (1995), S. 205-210 
    ISSN: 1570-7458
    Keywords: nitrogen ; maize ; lepidopterous stem and cob borers ; Sesamia calamistis ; Eldana saccharina ; Mussidia nigrivenella ; Cryptophlebia leucotreta ; dead hearts ; stem tunneling ; yields
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of four nitrogen levels (0, 60, 90 and 120 kg N/ha) on growth of maize and development of lepidopterous pests was investigatdd in a field trial. Nitrogen had a positive effect on both plant growth variables (plant height, stem diameter and yield), and development and survival ofSesamia calamistis andEldana saccharina, and thereby increased the incidence of dead hearts and stem tunneling. However, the percent yield loss due to artificial infestation decreased with increasing N application rate from 20% to 11% in the in the 0kg/ha and 120kg/ha treatment, respectively. Using a multiple regression analysis, plant height, plant diameter and stem tunneling were found to be the most important variables explaining the variability in maize yield.
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  • 44
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    Entomologia experimentalis et applicata 92 (1999), S. 165-177 
    ISSN: 1570-7458
    Keywords: Chrysomelidae ; herbivory ; Asteraceae ; life history ; nitrogen ; plant quality ; season
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phytophagous insects which feed on the leaves of herbaceous host plants have to adapt their life histories to the fact that protein nitrogen is usually highest in growing tissues in spring. We monitored field populations of larvae and adults of three chrysomelid species (Galeruca tanaceti (L.) (main host Achillea millefolium (L.) Yarrow), Cassida rubiginosa (Mueller) (main host Cirsium arvense (L.) Scop.) and Oreina luctuosa (Suffrian) (host Centaurea scabiosa (L.)) together with the amount of protein nitrogen of their food resources and host plant biomass. As expected, the development of host quality, measured as concentration of protein nitrogen, and host plant biomass showed inverse trends during the season. The euryphagous G. tanaceti attacks Achillea early and profits from high nitrogen concentrations in the leaves. Occasional overexploitations of local populations of Achillea are compensated by the capacity to move to other host species. In C. rubiginosa, a species with a host range restricted to the Cardueae, the main larval feeding activity is postponed to a period when the nitrogen content of the host leaves had dropped to 50% of its initial value, but when host plant biomass had increased by 30%. In the monophagous O. luctuosa the larval development is synchronized with a still later phase of host phenology, at which the nitrogen content is below 50% but plant biomass has reached its maximum. There seem to be selection factors, which oppose the use of high quality food in spring and which force the latter two species to postpone their larval development to a later time in the year. This could be caused by numerous factors like, for example, mean daytime temperature. Later in the season the larvae have to cope with the low quality of their host plants. They have, however, the advantage of large quantities of food available. A laboratory study with adults and mature larvae of O. luctuosa shows that this species can overcome low levels of protein nitrogen either by selecting younger leaves with higher nitrogen concentrations or by increasing the daily food consumption rate (RCR) on leaves with a low level of nitrogen and by a prolongation of the feeding period. In this way the larvae compensate the effect of lower daily growth rates (RGR) and a lower food conversion index (ECI) on poor food quality: Regardless of the level of protein nitrogen there was no statistically significant difference in total gain of weight during the third-instar feeding period and in the weight at the end of the third larval stage. The three investigated chrysomelids show that there exists a broad spectrum of adaptations to overcome the dilemma of variable food quality.
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  • 45
    ISSN: 1572-8927
    Keywords: Supersaturation ; nitrogen ; cosolvent ; cetyltrimethylammonium bromide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The decomposition of ammonium nitrite in water creates a supersaturated solution of nitrogen. The same process occurs in water-organic solvent mixtures. Acetone, dioxane, dimethylsulfoxide (DMSO) and dimethylformamide (DMF) are the cosolvents used in this study. The limits of supersaturation of nitrogen (C SL /mol L−1) were determined in all of these solvent mixtures by releasing the dissolved gas sonicationally and measuring the volume of released gas. C SL was generally increased in the presence of cosolvents. The effectiveness sequence of organic solvents was found to be as DMF〈DMSO〈Dioxanet≅Acetone. Transportation period of small bubbles formed during sonication is changed by compositions of solvent mixtures. These periods may depend on the viscosity of the solution. Effects of the presence of cetyltrimethylammonium bromide were also studied. It was concluded that there may be a relation between the strength of the watercosolvent H-bonds and C SL and all of the measured quantities of this study were generally affected by micelle formation.
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  • 46
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    Journal of insect behavior 11 (1998), S. 179-189 
    ISSN: 1572-8889
    Keywords: open-air foraging ; caste ; polyethism ; litter feeder ; nitrogen ; termite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Southeast Asian nasute termite Longipeditermes longipes forages on the open ground on leaf litter. Its monomorphic workers carry back food balls in their mandibles while dimorphic soldiers defensively surround the marching columns and the foraging patches. When mechanically disturbed, workers hide under the litter, whereas antennating soldiers face as closely as possible the source of disturbance. Foragers prefer the lower, nitrogen-rich layer of the litter. Soldier behavior and column organization (returning workers in the center lanes, outgoing workers in the two flanking lanes) are similar to those in the related genera Hospitalitermes and Lacessititermes, which, however, tend to forage above ground.
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  • 47
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    Catalysis letters 37 (1996), S. 163-165 
    ISSN: 1572-879X
    Keywords: nitrogen ; Rh(111) ; thermal desorption ; Arrhenius parameters ; lateral interactions ; NO decomposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Associative desorption of N atoms from the Rh(111) surface is simulated in the framework of the lattice-gas model. The Arrhenius parameters and nearest-neighbour lateral interaction employed to describe the measured thermal desorption spectra are as follows:v=1013 s−1,E d=40 kcal/mol, and ε1=1.7 kcal/mol. The results obtained are used to clarify the role of nitrogen desorption in the NO + CO reaction on Rh(111) atT=400–700 K andP NO≈P CO≈0.01 atm.
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  • 48
    ISSN: 1572-879X
    Keywords: adsorption ; adsorption isotherms ; dinitrogen ; FTIR spectroscopy ; geminal species ; NaY ; nitrogen ; zeolites
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Adsorption of N2 on NaY zeolites at 85 K and equilibrium pressures higher than 1 kPa results in the formation of geminal dinitrogen complexes characterized by an IR band at 2333.5 cm−1 (2255.4 cm−1 after adsorption of 15N2). With decreasing equilibrium pressure the complexes tend to loose one N2 ligand, thus forming linear species characterized by an IR band at 2336.8 cm−1 (2258.7 cm−1 after adsorption of 15N2). All species disappear completely after evacuation. Co-adsorption of N2 and CO revealed that the dinitrogen complexes are formed on Na+ cations. The changes in the concentrations of the linear and geminal N2 species with the changes in the equilibrium pressure are excellently described by equations of adsorption isotherms proposed earlier for mono- and di-carbonyls.
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  • 49
    ISSN: 1572-8757
    Keywords: kinetics ; isotope-exchange ; nitrogen ; adsorption ; methane ; zeolite ; equilibria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The Isotope Exchange Technique (IET) was used to simultaneously measure pure and binary gas adsorption equilibria and kinetics (self-diffusivities) of CH4 and N2 on pelletized 4A zeolite. The experiment was carried out isothermally without disturbing the adsorbed phase. CH4 was selectively adsorbed over N2 by the zeolite because of its higher polarizability. The multi-site Langmuir model described the pure gas and binary adsorption equilibria fairly well at three different temperatures. The selectivity of adsorption of CH4 over N2 increased with increasing pressure at constant gas phase composition and temperature. This curious behavior was caused by the differences in the sizes of the adsorbates. The diffusion of CH4 and N2 into the zeolite was an activated process and the Fickian diffusion model described the uptake of both pure gases and their mixtures. The self-diffusivity of N2 was an order of magnitude larger than that for CH4. The pure gas self-diffusivities for both components were constants over a large range of surface coverages (0 〈 θ 〈 0.5). The self-diffusivities of CH4 and N2 from their binary mixtures were not affected by the presence of each other, compared to their pure gas self-diffusivities at identical surface coverages.
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  • 50
    ISSN: 1572-879X
    Keywords: platinum ; rhodium ; alloy ; surface composition ; nitrogen ; oxygen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Two kinds of adsorbed N atoms exist on a Pt0.25Rh0.75(100) surface. One desorbs at 490 K and the other desorbs at 650 K. The former reacts with H2 at 400 K, but the latter does not. It is supposed that the adsorption of these two N atoms is responsible of the surface composition, ratio of Pt and Rh.
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  • 51
    ISSN: 1432-0789
    Keywords: Key words Microbial biomass C ; Water-soluble organic carbon ; Light fraction organic carbon ; Fertilizer ; nitrogen ; 13C nuclear magnetic resonance ; Infrared spectrophotometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Soil samples taken from four experimental sites that had been cropped to continuous corn for 3–11 years in Ontario and Quebec were analyzed to evaluate changes in quantity and quality of labile soil organic carbon under different nitrogen (N) fertility and tillage treatments. Addition of fertilizer N above soil test recommendations tended to decrease amounts of water-soluble organic carbon (WSOC) and microbial biomass carbon (MBC). The quality of the WSOC was characterized by 13C nuclear magnetic resonance and infrared spectrophotometry and the results indicated that carbohydrates, long-chain aliphatics and proteins were the major components of all extracts. Similar types of C were present in all of the soils, but an influence of management was evident. The quantity of soil MBC was positively related to the quantities of WSOC, carbohydrate C, and organic C, and negatively related to quantities of long-chain aliphatic C in the soil. The quantity of WSOC was positively related to the quantities of protein C, carbohydrate C, and negatively related to the quantity of carboxylic C. The quantity of soil MBC was not only related to quantities of soil WSOC but also to the quality of soil WSOC.
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  • 52
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    Biology and fertility of soils 26 (1998), S. 169-172 
    ISSN: 1432-0789
    Keywords: Key words Urea ; Coated fertilizers ; Ammonium ; nitrogen ; Nitrate nitrogen ; Nitrogen uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Understanding the fate of different forms of nitrogen (N) fertilizers applied to soils is an important step in enhancing N use efficiency and minimizing N losses. The growth and N uptake of two citrus rootstocks, Swingle citrumelo (SC), and Cleopatra mandarin (CM), seedlings were evaluated in a pot experiment using a Candler fine sand (hyperthermic, uncoated, Typic Quartzipsamments) without N application or with 400 mg N kg–1 applied as urea or controlled-release fertilizers (CRF; either as Meister, Osmocote, or Poly-S). Meister and Osmocote are polyolefin resin-coated urea with longevity of N release for 270 days (at 25°C). Poly-S is a polymer and sulfur-coated urea with release duration considerably shorter than that of either Meister or Osmocote. The concentrations of 2 M KCl extractable nitrate nitrogen (NO3 –-N) and ammonium nitrogen (NH4 +-N) in the soil sampled 180 days and 300 days after planting were greater in the soil with SC than with CM rootstock seedlings. In most cases, the extractable NH4 + and NO3 – concentrations were greater for the Osmocote treatment compared to the other N sources. For the SC rootstock seedlings, dry weight was greater with Meister or Poly-S compared with either Osmocote or urea. At the end of the experiment, ranking of the various N sources, with respect to total N uptake by the seedlings, was: Meister = Osmocote 〉 Poly-S 〉 Urea 〉 no N for CM rootstock, and Meister = Poly-S = Osmocote 〉 Urea 〉 no N for SC rootstock. The study demonstrated that for a given rate of N application the total N uptake by seedlings was greater for the CRF compared to urea treatment. This suggests that various N losses were lower from the CRF source as compared to those from soluble fertilizers.
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  • 53
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    Biology and fertility of soils 26 (1997), S. 31-34 
    ISSN: 1432-0789
    Keywords: Key words Microbial biomass ; Air-drying ; Extractable ; nitrogen ; Extractable phosphorus ; Tropical soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The microbial contribution to extractable N and P after the air-drying of eight Indian dry tropical Ultisols was quantified. Air-drying of the soils decreased microbial biomass C by 25–53% but increased extractable N and P by 14–34% and 24–121%, respectively. This increase in the extractable N and P was accounted for, to some extent, by microbial biomass killed due to air-drying. Microbial biomass contributes 17–36% and 19–82% to the extractable N and P, respectively, possibly due to air-drying of the soils. I conclude that due to contamination of microbial biomass with the available nutrients in air-dried soils, measurements of extractable nutrients should be made on field-moist soils.
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  • 54
    ISSN: 1436-5073
    Keywords: AES ; laser ; iron ; nitrogen ; oxygen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The laser induced modification of iron surfaces with atmospheric species was investigated by means of Auger electron spectroscopy (AES) and scanning electron microscopy (SEM). Different laser systems were used for irradiating iron samples in a wide range of the laser processing parameters up to small foci and ultra short pulses. A nitriding of iron connected with an oxidation of the near surface region was observed in the wavelength range between 193 nm and 10.6 μm using large foci (∼0.1 cm2) and short pulses (10...1400ns). In case of small foci (∼7·10−6cm2) with ns-pulses (50 ns) an enrichment of the iron melt with nitrogen and an advanced oxidation of the surrounding area of the laser spot were detected. When using shorter pulses (200 fs, 40 ps) no indications for a nitriding were found.
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  • 55
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    Nutrient cycling in agroecosystems 42 (1995), S. 1-11 
    ISSN: 1573-0867
    Keywords: nitrogen ; 15N humic substances ; acid hydrolysis ; analytical pyrolysis ; NMR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Most of the N in surface soils occurs in organic forms. The organic N in soil plays a key role in plant nutrition and soil fertility through its effects on microbial activity and nutrient availability. Typically, about one-third of the fertilizer N applied to temperate-zone soils is immobilized and retained in organic forms at the end of the growing season. A significant portion of this newly immobilized N is no more available to microorganisms and plants than the native humus N. Stabilization processes, probably involving polymerization of amino compounds and polyphenols, result in incorporation of N into humic substances with a concurrent reduction in N availability. This paper presents an account of the forms and nature of organic N in soil, emphasizing possible formation pathways, chemical characterization of humic substances through conventional and solid-state techniques, and the fate and composition of newly immobilized N in soil.
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  • 56
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    Nutrient cycling in agroecosystems 42 (1995), S. 139-148 
    ISSN: 1573-0867
    Keywords: denitrification ; methods ; 15N ; nitrate ; nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This paper attempts to answer the question: is denitrification a major route of N loss from tropical agro-ecosystems? This question turns out to be very difficult to answer due to a severe shortage of data on this process for tropical agro-ecosystems other than rice. Given this lack of data, I approach this question by analyzing data on denitrification and nitrous oxide flux in tropical native forest and pasture soils and attempt to make some conclusions and pose some hypotheses about the significance of denitrification in tropical agricultural soils. I also briefly review methods for measuring denitrification. The data analysis suggests that denitrification in tropical forest soils is strongly influenced by the nature and amount of soil C and N turnover. Studies to examine differences in denitrification in different tropical agricultural systems should focus on the effects of system management on C and N turnover. The data analysis also suggests that, just as in temperate regions, denitrification may not be a significant route of N loss from most tropical agricultural systems. However, field studies are necessary to determine if this is actually the case.
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  • 57
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    Nutrient cycling in agroecosystems 45 (1995), S. 221-233 
    ISSN: 1573-0867
    Keywords: fertilizer recovery ; modelling ; nitrogen ; nutrient efficiency ; nutrient surplus ; phosphorus ; Poland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Research on nutrient losses from agricultural systems should try to relate these losses to farm characteristics. This was done for private farms in two districts in Poland. Using data from a farm survey, nutrient surpluses and Nutrient Use Efficiency (NUE, defined as the ratio of outgoing and incoming nutrients) were calculated for nitrogen and phosphorus. Both nutrient surplus and NUE are relatively high. A model was developed to estimate surpluses and NUE from farm characteristics like location, farm size, fertilizer application level, animal density, grass production and sugar beet or potato area. The results of the model are satisfying for nutrient surplus (R2=0.9) and nitrogen NUE (R2=0.4). Estimation of phosphorus NUE was not satisfactory. High surpluses are associated with high fertilizer applications, high animal density and high grass production while an increasing share of sugar beets leads to lower surpluses. A high nitrogen NUE is associated with low fertilizer applications, low animal density and little grass production, and with a high sugar beet area share. Results suggest that, with exception of sugar beet, fertilizer recovery in Poland is very low. Sugar beet, however, combines high fertilizer applications with low surpluses and high NUE. The outcome of the model can be used in the design of environmental policies. The paper ends with some remarks on the type of measures that can be taken, and the effects these will have on private farms in Poland.
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  • 58
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    Nutrient cycling in agroecosystems 46 (1996), S. 81-90 
    ISSN: 1573-0867
    Keywords: elemental sulfur ; granule size ; nitrogen ; phosphorus ; potassium ; S oxidation ; sulfur fertilizers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Experiments were undertaken to determine the effect of granule size and nutrients in granulated compound fertilizers fortified with finely divided elemental sulfur (So) on the rate of So oxidation. In one experiment, So was banded together with or apart from triple superphosphate (TSP) while in two others, So was granulated with nutrient and inert carriers. A fourth experiment examined response to S in an So-fortified TSP from a range of granule sizes. Response and, in some cases, So recovery (using 35S labels) by test crops (maize, wheat, upland rice) was measured. In all experiments, P mixed with So increased plant growth and S recovery above treatments in which P and So were physically separated. There was however, no effect of distance of separation on S recovery. In one experiment, N as urea and N and P as diammonium phosphate (DAP) were also found to enhance response to So although to a lesser degree than P alone. These observations were attributed to a nutritional requirement of So-oxidizing microorganisms for P and N. Granulation of So with carriers also influenced oxidation rate, as inferred from the fertilizer S recovery. For a given So concentration, the effect was inversely proportional to the mean diameter of granules. It is shown that this relationship can be explained if one assumes that So particles in granules collapse into a fixed number of aggregates per granule irrespective of granule size when the soluble nutrient carrier dissolves and diffuses away from the point of application.
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  • 59
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    Nutrient cycling in agroecosystems 46 (1996), S. 53-70 
    ISSN: 1573-0867
    Keywords: crop ; emission ; fertilizer ; nitrogen ; nitrous oxide ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This analysis is based on published measurements of nitrous oxide (N2O) emission from fertilized and unfertilized fields. Data was selected in order to evaluate the importance of factors that regulate N2O production, including soil conditions, type of crop, nitrogen (N) fertilizer type and soil and crop management. Reported N2O losses from anhydrous ammonia and organic N fertilizers or combinations of organic and synthetic N fertilizers are higher than those for other types of N fertilizer. However, the range of management and environmental conditions represented by the data set is inadequate for use in estimating emission factors for each fertilizer type. The data are appropriate for estimating the order of magnitude of emissions. The longer the period over which measurements are made, the higher the fertilizer-induced emission. Therefore, a simple equation to relate the total annual direct N2O−N emission (E) from fertilized fields to the N fertilizer applied (F), was based on the measurements covering periods of one year: E=1+1.25×F, with E and F in kg N ha-1 yr-1. This relationship is independent of the type of fertilizer. Although the above regression equation includes considerable uncertainty, it may be appropriate for global estimates.
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  • 60
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    Nutrient cycling in agroecosystems 46 (1996), S. 179-187 
    ISSN: 1573-0867
    Keywords: electrical conductivity ; leaching ; nitrogen ; pH ; phosphorus ; potassium ; release pattern ; slow-release fertilizers ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract We studied the effect of temperature on the release of N, P, and K from slow-release fertilizers (SRF). The study was conducted in micro-lysimeters filled with moist peat medium. Increasing the temperature from 4 to 12°C slightly increased N release from three different slow-release N (SRN) carriers with different particle sizes and coating thicknesses. At 21°C the rate of release was significantly different than the other two temperatures. Urea formaldehyde (UF), sulphur coated urea (SCU) and coated calcium nitrate (CCN), incubated in sphagnum moss peat, released between 3 and 20% of the applied N in six weeks. For eight synthetic and organic NPK carriers, the release pattern was similar to UF and SCU. However, the leaching losses of N from the NPK fertilizers were up to twenty times more than for the SRN products. Except for Osmocote® and Duna, which released 30–40% of the applied N as mineral-N within six weeks, all other slow-release and slowly mineralized NPK carriers acted like readily water-soluble compound NPK. Temperature did not affect the nutrient release from NPK fertilizers.
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  • 61
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    Nutrient cycling in agroecosystems 50 (1998), S. 271-276 
    ISSN: 1573-0867
    Keywords: nitrogen ; monitoring ; dairy farming ; simulation models ; risk assessment ; soil variability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract At the ‘De Marke’ experimental farm a dairy farm was set up with the aim of meeting environmental and economic goals. The farm management with respect to nitrogen emphasized reduction of fertilization and a cattle grazing system that should result in nitrate concentrations in the groundwater below the EC-directive level of 11.3 mg l-1 nitrate-N. At six sites in six different fields of ‘De Marke’, these concentrations were monitored for 4 years. A direct comparison with the chosen limit was possible for these sites, but an evaluation of the environmental achievements of the farming system at farm level was also required. This was achieved by using simulation models and additional information about soils and field management. Based on multiple soil profile descriptions, frequency distributions of model output were generated, allowing a risk assessment for the total farm. The probability of exceeding the chosen threshold value of 11.3 mg l-1 nitrate-N during the period of summer 1991- spring 1995 was 63% for the whole farm, with marked differences between years, crops and hydrological conditions.
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  • 62
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    Nutrient cycling in agroecosystems 50 (1998), S. 321-324 
    ISSN: 1573-0867
    Keywords: nutrient modelling ; leaching ; nitrogen ; phosphorus ; schematization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In context of preparing the Fourth National Policy Document on Water Management in the Netherlands effects of different scenarios of fertilizer management on nitrogen (N) and phosphorus (P) leaching from rural areas into Dutch surface waters were analyzed. The manuscript offers insight into the model instrument that is used to simulate the different scenarios. Main parts of the modelinstrument are: a procedure to schematize the Netherlands in horizontal areal units, field scale mechanistic models for water and nutrient behaviour in the soil and an empirical model for fertilizer additions.
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  • 63
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    Nutrient cycling in agroecosystems 52 (1998), S. 277-287 
    ISSN: 1573-0867
    Keywords: dairy farming ; efficiency ; nitrogen ; organic ; pig farming ; surplus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This study is in two parts. In the first part, nitrogen (N) losses per unit of milk and meat in Danish conventional and organic pig and dairy farming were compared on the basis of farm data. In the second part, organic and conventional dairy farming were compared in detail, using modelling. N-surpluses at different livestock densities, fodder intensities, and soil types were simulated. Finally, simulated N-surpluses were used in national scenarios for conversion to organic dairy farming in Denmark. In Part one, pig farming was found to have a higher N-efficiency than dairy farming. Organic pig production had a lower N-efficiency and a higher N-surplus per kg meat than conventional pig production. The possibilities to reduce N-loss by conversion to organic pig production therefore appear to be poor. Organic dairy farming had a higher N-efficiency and a lower N-surplus per kg milk than conventional dairy farming. Conversion from conventional to organic dairy farming may therefore reduce N-losses. In Part two, a positive correlation between livestock density and N-surplus ha-1 was found for dairy farming. For all simulated livestock densities, fodder feeding intensities and soil types, organic systems showed a lower N-surplus per unit of milk produced than conventional systems. National scenarios for dairy farming showed that the present Danish milk production could be achieved with a 24% lower total N-surplus if converted from intensive conventional farming to extensive organic farming. At the same time, N-surplus ha-1 and N-surplus (t milk)-1 would be lowered by 50% and 25% respectively. Changing from intensive to extensive conventional dairy farming with a livestock density equal to that in the organic scenario resulted in a reduction in N-surplus ha-1 of 15%. It was concluded that a reduction in total N-loss from agriculture is possible by converting from conventional to organic dairy farming but at the cost of either lower production on the present dairy farm area, or the current production on a substantially larger area.
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  • 64
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    Nutrient cycling in agroecosystems 52 (1998), S. 289-301 
    ISSN: 1573-0867
    Keywords: food production and consumption ; mitigation strategies ; nitrogen ; nitrogen emission ; nitrous oxide ; sustainability of human N cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract During the past four decades the authors perceive that an increasing non-sustainability (Disintegration) within the agriculture , human nutrition, waste management complex has occurred both in Germany and the European Union. Compared to the basic needs of the population for nutritive energy, fat and protein, we estimate that the production and consumption of food and feed is more than 50% higher than necessary. Using nitrogen (N) input into German agriculture in 1991/92 as an example, we estimated that the N input of 191 kg ha-1 was 2 to 3 times too high. This high N input resulted in the net biomass production of 45 kg ha-1, a 25% efficiency. This inefficiency causes emissions of reactive N and other nutrient compounds into the hydrosphere and atmosphere that were 2 to 8 times too high. For example the contributions of agriculture to the total annual N2O–N emissions of Germany (during 1990–1992), Europe (1990) and of the world (1989) were 110, 691 Gg and 6.7 Tg or 52, 62 and 41%, respectively. The authors demonstrate that emissions of N and P from Germany and EU waste water management systems are also higher than necessary because nutrient recycling is not practiced extensively. Excessive food production and consumption has made the agriculture/human nutrition/waste and waste water complex, like the energy/transportation complex, a main cause of new transboundary environmental damage such as soil and water acidification, hypertrophication of near-natural terrestrial and aquatic ecosystems and climate change. We propose that a sustainable food production/consumption system can be developed that is based both on need-oriented production and consumption with no net exports and on recovery, recycling and more efficient use of nutrients. Using N as an example, the authors show which short and long term action aims must be set and realized by the year 2015, to meet environmental, economical and social sustainability requisites. The suggested, assumed sustainable N balance for German agriculture is characterized by a critical annual input and surplus maximum of 80 and 45 kg N ha-1 respectively, which should almost double biomass production efficiency for N utilization. This estimate is based on reducing animal stocking rates to 0.5 gross weight unit ha-1 to attain no net mineralization or immobilization of N in the soil.
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  • 65
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    Nutrient cycling in agroecosystems 52 (1998), S. 171-178 
    ISSN: 1573-0867
    Keywords: atmospheric deposition ; boreal forests ; critical loads ; forest growth ; gas losses ; leaching ; nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Nitrogen is brought into natural ecosystems from the atmosphere through N-fixation and deposition of NH 4 + and NO 3 - as wet and dry deposition. N is lost from terrestrial ecosystems unaffected by human activities by leaching or as gas, but the losses from different forest-and vegetation types are poorly quantified. The leaching is hampered by uptake in the vegetation and by immobilisation by soil organisms. The gas loss of N in the form of N2O and N2 appears to be rather small, but the loss of NO is unknown. Human activities such as those leading to the increased atmospheric dry and wet deposition of N, may affect the N-losses, but the increase in losses are likely to be very dependent on the amounts of N deposited. The present paper discusses the fate of the N deposited under the existing pollution climate in Norway where N deposition above the natural background has taken place for at least 50 years. The deposition today varies from about 15–20 kg N ha-1 yr-1 in the southernmost parts of the country to background values of about 2 kg ha-1 yr-1 in the north. Even in areas with the highest loads there are no clear indications that N-leaching in forest ecosystems has increased to ‘unacceptable’ levels. The main reason for this appears to be that most of the N deposited are immobilised in forest soils and utilised by forest trees and ground cover vegetation to increased biomass production. At present therefore, no clear signs of N-saturation can be found. This is in relatively good accordance with estimates of critical loads for N in Norwegian coniferous forests. Estimates of immobilisation, gas losses, net uptake in vegetation, biological fixation as well as a figure for ‘acceptable’ leaching, indicate that the long-term critical load of N might be of the order 10 to 30 kg N ha-1 yr-1. Most of the N deposited from the atmosphere appears therefore so far to be retained in the forests and only a small proportion seems to be lost to ground-and surface waters.
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    Nutrient cycling in agroecosystems 53 (1999), S. 209-218 
    ISSN: 1573-0867
    Keywords: cattle slurry ; fertilizer splitting ; nitrogen ; recovery ; residual nitrogen ; Zea mays L
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The recovery of soil mineral nitrogen (N) by crops, and its subsequent utilisation for dry matter (DM) production may be increased when the application of N is postponed until after crop emergence. The significance of this strategy for silage maize was studied in nine field experiments on Dutch sandy soils from 1983 to 1988. In five experiments the effect of slurry applied before planting at a rate of circa 66 m3 ha-1, was compared to the effect of a similar rate of which half was applied before planting and half at the 4–6 leaf stage. In the 4-6 leaf stage slurry was either injected or banded. In four other experiments the effect of mineral fertilizer-N splitting was studied. In these experiments, 30 m3 ha-1 cattle slurry, applied before planting, was supplemented with mineral fertilizer-N at rates ranging from 40 to 160 kg ha-1, either fully applied before crop emergence or split. When split, 40 kg ha-1 of the mineral fertilizer-N rate was banded at the 4–6 leaf stage. According to balance sheet calculations, substantial losses of slurry N and mineral fertilizer-N occurred during the growing season. Losses were compensated for, however, by apparent mineralization, ranging from 0.34 to 0.77 kg N ha-1 day-1. Split applications of cattle slurry had a significant positive effect on the DM yield in two out of five experiments compared to the conventional non-split application, but only when the post-emergence slurry application was banded which is no longer in accordance with present legislation. Split applications of mineral fertilizer-N had a significant positive effect in one experiment where rainfall was excessive but not in the others. The results provide insufficient evidence to recommend farmers to split applications. Soil mineral N sampling at the 4–6 leaf stage should hence be considered a control on the appropriateness of early N applications after exceptional weather conditions rather than a routine observation on which the post-emergence N dressing is to be based in a deliberate splitting strategy. Our data suggest that the financial return of a 40 kg ha-1 supplementation with mineral fertilizer-N, was questionable when more than 175 kg N ha-1 were found in the upper 0.6 m soil layer at the 4–6 leaf stage.
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    Nutrient cycling in agroecosystems 53 (1999), S. 259-267 
    ISSN: 1573-0867
    Keywords: farming systems ; nitrogen ; nitrogen budgets ; sustainability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Three approaches to nitrogen budgeting were developed and their ability to quantitatively describe nitrogen cycling in a fertilizer based and a grass–clover based beef system tested. Budgets ranged in complexity from the Economic Input:Output (EIO) budget, which accounted simply for purchases and sales of nitrogen over the farmgate, through the Biological Input:Output (BIO) budget, which included estimates of biological nitrogen fixation and attempted to partition losses into leaching and gaseous forms, to the Transfer:Recycle:Input:Output (TRIO) budget, which also accounted for key soil processes. Nitrogen unaccounted for in the fertilized system decreased with increasing budget complexity (285, 212 and 188 kg ha-1 yr-1 unaccounted for by the EIO, BIO and TRIO budgets, respectively). In the legume based grass–clover system, the EIO budget did not accurately describe total nitrogen inputs as it did not include 146 kg ha-1 yr-1 from symbiotic nitrogen fixation. In the grass–clover system, nitrogen unaccounted for was again greater using the BIO than the TRIO budget (103 and 79 kg ha-1 yr-1, respectively). In conclusion, the most complex budgeting approach (TRIO) was able to account for the fate of a greater proportion of nitrogen inputs than the simpler approaches. However, the perceived success of the different approaches was strongly dependent on the precise objective.
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    Nutrient cycling in agroecosystems 55 (1999), S. 1-6 
    ISSN: 1573-0867
    Keywords: chlorophyll meter ; irrigation ; LAI ; nitrogen ; Spring Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A Spring Wheat crop was grown using three irrigation levels and nitrogen rate applications to evaluate chlorophyll meter measurements as a possible nitrogen nutrition index for modelling. These measurements yielded the most reliable indications at Zadoks GS45. The lower limit indicating severe nitrogen deficiency in the leaves was approximately 35 SPAD units while the upper limit of 45 SPAD units, indicated an excess consumption.
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  • 69
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    Nutrient cycling in agroecosystems 55 (1999), S. 89-94 
    ISSN: 1573-0867
    Keywords: algae ; flooded soils ; N cycling ; nitrogen ; 15N ; rice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Algal N labelled with 15N added to a flooded soil in laboratory columns without plants was studied to determine the changes over time in the fate of N assimilated by algae and to study how its fate is affected by (a) exclusion of light simulating complete closure of the rice canopy, and (b) addition of fertilizer-NH4 *. In the light but with no added fertilizer-N there was little net mineralization of the added algal N during the first 4 weeks, but after 8 weeks 42% had been mineralized, of which 95% was denitrified. Exclusion of light caused net mineralization to proceed more rapidly in the first 4 weeks due to the death of algal cells and lowered reassimilation. After 8 weeks 51% had been mineralized, of which 54% was denitrified, 16% volatilized and 30% was present as KCl exchangeable NH4 +-N. Application of fertilizer-NH4 + apparently caused mineralization of 25% of the algal N within one week but the results were probably affected by pool substitution in which labelled N mineralized to NH4 +-N was diluted with fertilizer – NH+ 4 and then immobilized leaving more labelled NH4–N in the mineral pool. After 8 weeks, 42% of algal N had been mineralized, of which 69% was estimated to have been denitrified, 19% lost through NH3 volatilization and 12% remained as extracted NH4 ++NO- 3. Uptake of N by a rice crop would reduce the gaseous losses. Algal N was mineralized quickly enough to be available during the growing season of a rice crop and, depending on field conditions, algae may have a role in assimilating N and protecting it from loss as well as being a major driving force for NH3 volatilization through diurnal increases in pH.
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    Nutrient cycling in agroecosystems 42 (1995), S. 185-192 
    ISSN: 1573-0867
    Keywords: 15N ; nitrogen ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The use of15N as a tracer in soil/plant research is examined. The limitations of the so-called Ndff approach are discussed to show the need to consider not just the fate of the added label but also the path that was followed and the rate of the transformation. The development of15N isotope dilution techniques to determine gross rates of nitrogen transformation in soil is reviewed with some indications as to the further development of the approach.
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  • 71
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    Nutrient cycling in agroecosystems 47 (1996), S. 243-250 
    ISSN: 1573-0867
    Keywords: fertilizer value ; nitrogen ; phosphorus ; poultry manure ; urea ; wetland rice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Poultry manure applied alone or in combination with urea at different N levels was evaluated as a N source for wetland rice grown in a Fatehpur loamy sand soil. Residual effects were studied on wheat which followed rice every year during the three cropping cycles. In the first year, poultry manure did not perform better than urea but by the third year, when applied in quantities sufficient to supply 120 and 180 kg N ha−1, it produced significantly more rice grain yield than the same rates of N as urea. Poultry manure sustained the grain yield of rice during the three years while the yield decreased with urea. Apparent N recovery by rice decreased from 45 to 28% during 1987 to 1989 in the case of urea, but it remained almost the same (35, 33 and 37%) for poultry manure. Thus, urea N values of poultry manure calculated from yield or N uptake data following two different approaches averaged 80, 112 and 127% in 1987, 1988 and 1989, respectively. Poultry manure and urea applied in 1:1 ratio on N basis produced yields in between the yields from the two sources applied alone. After three cycles of rice-wheat rotation, the organic matter in the soil increased with the amount of manure applied to a plot. Olsen available P increased in soils amended with poultry manure. A residual effect of poultry manure applied to rice to supply 120 or 180 kg N ha−1 was observed in the wheat which followed rice and it was equivalent to 40 kg N ha−1 plus some P applied directly to wheat.
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  • 72
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    Nutrient cycling in agroecosystems 48 (1997), S. 241-246 
    ISSN: 1573-0867
    Keywords: barley ; denitrification ; fertilizerefficiency ; mineralization ; nitrogen ; sludge
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Enhanced microbial activity following sewage sludge land application may affect soil N cycling and, therefore, plant available N. We studied the effect of anaerobically treated sewage sludge on N-fertilizer efficiency and on some aspects of the soil N cycling. Field plots (3 m × 9 m) sown with barley (Hordeum vulgare L.) in November were amended with a) sludge (80 mg ha-1) and ammonium nitrate (150 kg N ha-1), b) ammonium nitrate (150 kg ha-1) only, c) or left unamended. Monthly soil samples were taken from 0 to 20-and 20 to 50-cm depths to determine soil inorganic N (NH4 +, NO3-). Denitrification in the upper 20-cm horizon was estimated by measuring N2O+N2 emission from undisturbed soil samples by the acetylene-inhibition technique. Crop yield parameters were analysed before harvesting, and grain production was recorded. With respect to the control, the yield increase for the N-fertilizer treatment was 85% and 45% for the sludge + N-fertilizer treatment. The decrease of N-fertilizer efficiency in sludge amended plots was presumably due to a decrease in spring plant available N. Presumably, microbial immobilisation and denitrification in organic amended treatments were responsible for the decrease in N-fertilizer efficiency.
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  • 73
    ISSN: 1573-0867
    Keywords: Phosphorus ; nitrogen ; iron ; VAM ; Rhizobium ; faba-bean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effect of rhizobial inoculation, vesicular arbuscular mycorrhizal (VAM) fungi on the growth, P, N and Fe uptake by faba-bean plants (Vicia faba L.V. Giza 2) grown in virgin sandy soil, treated with super or rock-P were studied under green-house conditions. The earthern pots received a half of the recommended rate of P either as single super phosphate or rock-P in the rate of 20 mg P/kg soil, and calcium ammonium nitrate was added in the rate of 10 mg N/kg soil. Iron was applied in two levels 0 and 5 mg Fe/kg soil, in the form of iron sulphate (FeSO4·7H2O). Dry matter yield, as well as P, N and Fe-uptake were determined. Nodule numbers and their dry weights, spore numbers and mycorrhizal root infection were determined. Results indicated that, fungal infection and rhizobial inoculation either alone or in combination increased dry matter yield as compared to uninoculated plants, whereas the percentages increase in dry matter were 34, 26 and 57% in case of super-P application, while they were 56, 47 and 89% in case of rock-P when inoculated withRhizobium, VAM and dual inoculation respectively. Also P, N and Fe uptake were significantly increased due to inoculation, and dual inoculation resulted the highest effect. Generally, inoculation withRhizobium and/or mycorrhizae can remove the deficient effect of P and Fe on N2-fixation and plant growth in the soil of low nutrients content.
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  • 74
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    Nutrient cycling in agroecosystems 48 (1997), S. 37-50 
    ISSN: 1573-0867
    Keywords: greenhouse gases ; nitrogen ; NOx ; nitrous oxide ; ozone precursors ; trace gases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Over 60 published papers reporting field measurements of emissions of nitric oxide (NO) from soil are reviewed, and over 100 annual estimates of NO emissions were made for various types of ecosystems, including agricultural fields. These data were stratified by biome and the mean of each stratum was multiplied by an estimate of the biome area. A few strata were identified as clearly having low NO emissions: montane forests, swamps and marshes, tundra, and temperate forests that are not heavily affected by N deposition. The largest emissions were observed in tropical savanna/woodland, chaparral, and cultivated agriculture, but variation in NO emissions within these strata was also large. Although the stratification scheme fails to partition this within-stratum variation, it does clearly identify these biomes as globally important sources of NO and as areas where more research is needed to investigate within-biome variation in NO emissions. It is too early to tell whether differences in NO emissions between temperate and tropical agriculture are significant, but it is clear that agriculture is an important source of NO and that management practices affect NO emissions. The best current estimate of the global soil source of NO is 21 Tg N yr-1. Adsorption of NOx onto plant canopy surfaces may reduce emissions to the atmosphere to as low as 13 Tg N yr-1, although the absorption effect is probably smaller than this. An error term for the global estimate is difficult to determine, but it is at least ±4 and perhaps as large at ±10 Tg N yr-1. Hence, only modest progress has been made in narrowing uncertainties in the estimate of the global soil source of NO, although some published lower estimates appear unlikely. This inventory reconfirms that the soil source of NO is similar in magnitude to fossil fuel emissions of NOx. Further narrowing of the uncertainty of the estimate of global soil NO emissions will require more sophisticated and carefully chosen stratification schemes to address variation within biomes based on soil fertility, soil texture, climate, and management and will require linking this type of inventory and stratification with mechanistic models.
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    Agroforestry systems 42 (1998), S. 181-194 
    ISSN: 1572-9680
    Keywords: Acacia ferruginea ; Albizia lebbeck ; Faidherbia albida ; nitrogen ; sorghum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The influence of three nitrogen fixing tree (NFT) species viz., Faidherbia albida, Acacia ferruginea, Albizia lebbeck and four nitrogen levels (0, 20, 40 and 60 kg N ha−1) on intercropped rainfed sorghum was investigated at Hyderabad, India. The trees were established in shallow alfisols during 1985 with a spacing of 4 × 4 m. Intercropping was done in 1993 and 1994. The effect of trees on radiation interception, soil moisture, crop growth, yield components and yield of sorghum was examined. Association of tree species reduced grain and dryfodder yields of sorghum to an extent of 12 to 40% compared to sole crop situation. The reduction was maximum under A. lebbeck, minimum with F. albida and moderate under A. ferruginea. Application of 40 kg N ha−1 resulted in increased grain and dryfodder yields over other levels. Crop growth in terms of LAI and drymatter had similar response. The receipt of photosynthetically active radiation (PAR) was low under NFTs compared to open situation. The relative PAR intercepted under the trees was in the order: F. albida 〉 A. ferruginea 〉 A. lebbeck. Soil moisture status was more favourable under F. albida than under the other tree species. Soil moisture at all stages of crop growth was more in sole crop situation.
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  • 76
    ISSN: 1572-9680
    Keywords: fibre ; intake ; nitrogen ; palatability ; tannin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The aim of this work was to assess whether degradability, gas production or chemical constituents could predict the preference of browses. Forty tropical browse species leaves with a crude protein (CP) content ranging from 79 to 307 g kg-1 DM were used for this study. The neutral detergent fibre (NDF) ranged from 220 to 694 g kg-1 DM, while acid detergent fibre (ADF) ranged from 146 to 523 g kg-1 DM. The NDF-bound nitrogen (NDFN) and ADF-bound nitrogen were particularly high in Calliandra calothyrsus, Acacia polyacantha, Sesbania sesban, Acacia venosa and Acacia hockii. High levels of tannins were observed in Acacia species especially A. dolichocephala, A. hockii, A. microbotrya and A. salicina. High levels were also observed in Flemingia macrophyla and Leucaena pallida. The browse species differed (P 〈 0.05) in DM in sacco degradability coefficients. High potential degradability (PD) and effective degradability (ED) were observed in Sesbania spp, Moringa stenopetala, Indigofera arrecta, Chamaecytisus palmensis and Atriplex spp. The browses differed (P 〈 0.05) in asymptotic gas (Ag) production (ml g-1 OM), but had similar (P 〉 0.05) times of incubation at which half of the asymptotic gas had been formed. Preference and DM intake were positively correlated (P 〈 0.01) to NDFN, but negatively correlated (P 〈 0.05) to NDF and ADF. The PD and Ag were negatively (P 〈 0.001) related to NDF, ADF and lignin. Total phenols (TP) and condensed tannins (CT) were negatively (P 〈 0.05) related to PD, ED and Ag. A positive correlation was observed between CT and NDF-bound condensed tannins (r = 0.55, P 〈 0.001) and, CT and TP (r = 0.40, P 〈 0.01). Prediction equations were poor for DM intake and preference, moderate for gas production and good for potential and effective degradabilities. The phenolic components were more related to dry matter degradation and gas production than to preference and dry matter intake. NDFN and Ag made a positive contribution to both preference and DM intake. It was concluded that chemical constitutes such as N, NDF, NDFN, ADF and lignin are essential to predict the nutritive value of browses.
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  • 77
    ISSN: 1572-9702
    Keywords: tomato plants ; susceptibility ; mite ; tridecan-2-one ; nitrogen ; potasium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The objective of this work was to study the effect of NK fertilization levels and canopy height on the resistance of Lycopersicon hirsutum and Lycopersicon esculentum to Aculops lycopersici (Acari: Eriophydae). The effects of NK fertilization levels and canopy height in the leaf size and density of trichomes and their effects on tridecan-2-one (2-TD) and undecan-2-one (2-UD) limiting the attack of A. lycopersici on tomato plants were assessed. Different NK fertilization levels had no effect on the resistance of L. hirsutum to A. lycopersici. No significant differences were found in attack rates of this mite on leaves of the top and median parts of L. hirsutum canopy. The type and density of trichomes were the main determining factor of A. lycopersici attack on tomato plants. High trichome densities and type VI glandular trichomes which produce tridecan-2-one are important resistance factors on tomato plants. L. hirsutum showed a high resistance level to A. lycopersici due to high densities of type VI glandular trichomes and consequently higher levels of tridecan-2-one in its leaves.
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    Landscape ecology 10 (1995), S. 337-348 
    ISSN: 1572-9761
    Keywords: fire ; nitrogen ; NDVI ; transect ; watershed
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Transects across watersheds with varying fire histories and remotely-sensed data were used to study vegetation-resource interactions in a tallgrass prairie in Kansas. Paired plots (fertilized, control) were established along these transects and sampled for grass and forb biomass during the 1989 and 1990 growing seasons. Fertilization resulted in significant production responses in grass and total biomass on the west slopes of the annually burned (ID) and infrequently burned (N4) watersheds for both years (p = 0.05). In 1989, fertilization also produced a significant increase in grass biomass on the west slope of the unburned transect (p = 0.05), however, total production was not significantly increased. East slopes were insensitive to nitrogen additions. Differences in production response along these transects were assessed by testing the interaction between fertilization response and slope position. Significant interactions occurred on both 1D and N4, but only in 1990. Production data for both years were also compared to Normalized Difference Vegetation Index (NDVI) values derived from thematic mapper (TM) images for 1989 and 1990. When differences among transects or watersheds were statistically different, a positive relationship between NDVI and biomass was observed. NDVI values accurately reflected the spatial patterns of production along these transects for both years although not necessarily the magnitude.
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  • 79
    ISSN: 1572-9761
    Keywords: forest productivity ; NPP ; runoff ; climate ; nitrogen ; northeastern U.S. ; modeling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We used the PnET-II model of forest carbon and water balances to estimate regional forest productivity and runoff for the northeastern United States. The model was run at 30 arc sec resolution (approximately 1 km) in conjunction with a Geographic Information System that contained monthly climate data and a satellite-derived land cover map. Predicted net primary production (NPP) ranged from 700 to 1450 g m2 yr1 with a regional mean of 1084 g m2 yr1. Validation at a number of locations within the region showed close agreement between predicted and observed values. Disagreement at two sites was proportional to differences between measured foliar N concentrations and values used in the model. Predicted runoff ranged from 24 to 150 cm yr1with a regional mean of 63 cm yr1. Predictions agreed well with observed values from U.S. Geologic Survey watersheds across the region although there was a slight bias towards overprediction at high elevations and underprediction at lower elevations. Spatial patterns in NPP followed patterns of precipitation and growing degree days, depending on the degree of predicted water versus energy limitation within each forest type. Randomized sensitivity analyses indicated that NPP within hardwood and pine forests was limited by variables controlling water availability (precipitation and soil water holding capacity) to a greater extent than foliar nitrogen, suggesting greater limitations by water than nitrogen for these forest types. In contrast, spruce-fir NPP was not sensitive to water availability and was highly sensitivity to foliar N, indicating greater limitation by available nitrogen. Although more work is needed to fully understand the relative importance of water versus nitrogen limitation in northeastern forests, these results suggests that spatial patterns of NPP for hardwoods and pines can be largely captured using currently available data sets, while substantial uncertainties exist for spruce-fir.
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    Landscape ecology 11 (1996), S. 27-38 
    ISSN: 1572-9761
    Keywords: abandoned channels ; floodplain ; nitrogen ; organic matter ; phosphorous ; potassium ; sediment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The nature of sediments in abandoned channels is an important component of their development as floodplain wetlands. The texture, organic matter, phosphorous, potassium, and nitrogen content of sediments were determined for abandoned channels along the Iowa and Cedar Rivers near their confluence in Iowa. Differences in the levels of these constituents were examined among categories of three landscape gradients: present connectivity to the river, time since abandonment, and proximity to agricultural land use. Local scale processes of ecological development are seen in the importance of time for increased organic matter and nitrogen. Basin scale processes of sediment transport and deposition are revealed by the importance of connectivity for decreases in these two elements, and by the counter-intuitive findings for nitrogen and especially phosphorous and potassium in relation to agricultural proximity. Location on a floodplain is important for differentiating development, but it cannot be reduced to univariate gradients.
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  • 81
    ISSN: 1572-9761
    Keywords: wetlands ; non-point source pollution ; nitrogen ; watershed ; leaching ; geographic information system ; landscape ; groundwater
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We developed a spatially-explicit, quantitative Nitrogen Leaching Index to assess the potential for non-point source subsurface nitrogen pollution to wetlands. The index was based on the leaching potential of the watershed soils, the amount of nitrogen available for leaching, and the spatial position of nitrogen sources in the watershed. A raster or cell-based geographic information system (GIS) was used to estimate the necessary data inputs for calculating the index, such as soil hydrologic group, land use/soil type combination, groundwater residence time, and location of septic systems. The Total and Average Watershed Nitrogen Leaching Index (TWNLI and AWNLI) were calculated by summing and averaging, respectively, individual cell contributions over a watershed. Analysis of nine wetland watersheds in central New York state, USA, with mixed forest and agricultural land uses illustrated the use of the index for identifying and ranking wetlands with potential nitrogen pollution. Results showed that the spatial characteristics of a watershed potentially can effect subsurface nitrogen delivery to groundwater-dominated wetlands. The use of an index based on watershed soils, topography, and land use may be useful for assessing potential nitrogen pollution to wetlands at a regional scale.
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    Journal of thermal analysis and calorimetry 53 (1998), S. 111-121 
    ISSN: 1572-8943
    Keywords: air ; cobalt dopant ; iron dopant ; n-butane ; nitrogen ; thermogravimetric analysis ; vanadium phosphorus oxides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The transformation of VOHPO4·0.5H2O (VPO) precursor doped with cobalt or iron for n-butane oxidation to maleic anhydride was investigated by thermogravimetric analysis under air and nitrogen, with and without n-butane in the flow. While almost no effect was observed in nitrogen or air, a strong influence of the doping was observed when n-butane was added to the nitrogen or air. This resulted in a delay of the decomposition of the precursor and a further reoxidation of the VPO catalyst, particularly for doping with cobalt at low percentage (1%). This shows that doping can change the oxidation state of vanadium phosphorus oxide catalysts, which can explain differences in their catalytic performances and the favourable effect of doping by cobalt.
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    Plasma chemistry and plasma processing 15 (1995), S. 279-307 
    ISSN: 1572-8986
    Keywords: Transport coefficients ; transport properties ; viscosity ; thermal conductivity ; electrical conductivity ; diffusion coefficient ; Chapman-Etskog method ; air ; argon ; nitrogen ; oxygen ; plasma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Calculated values of the viscosity, thermal conductivity and electrical conductivity of air and mixtures of air and argon, air and nitrogen, and air and oxygen at high temperatures are presented. In addition, combined ordinary, pressure, and thermal diffusion coefficients are given for the gas mixtures. The calculations, which assione local thermodynamic equilibrium, are performed for atmospheric pressure plasmas in the temperature range from 300 to 30,000 K. The results for air plasmas are compared with those of published theoretical and experimental studies. Significant discrepancies are found with the other theoretical studies; these are attributed to differences in the collision integrals used in calculating the transport coefficients. A number of the collision integrals used here are significantly more accurate than values used previously, resulting in more reliable values of the transport coefficients.
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    Plasma chemistry and plasma processing 16 (1996), S. 577-603 
    ISSN: 1572-8986
    Keywords: Cathode erosion ; electrode materials ; argon ; nitrogen ; hydrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Cathode erosion continues to be a problem hindering the widespread application of plasma technology. In this work, cathode erosion was studied on titanium, stainless steel 314, copper-nickel 10% and 30%, and copper 122 for magnetically rotated arcs operating in argon, nitrogen, and argon/hydrogen mixtures at a constant magnetic flux density of 0.1 T Titanium and stainless steel gave very low erosion rates in argon (0.2 and 0.3, μg/C respectively). Cupronickels were shown to be suitable for nitrogen and hydrogen plasmas. The slope of hydrogen solubility versus temperature in the cathode material was found to be important in determining hydrogen plasma erosion characteristics. When the plasma gas has a high solubility in the cathode material, or can react with the cathode, a negative erosion rate may result. When gas solubility in the cathode is low, oxide stability and mode of electron emission may govern the erosion rate. A high gas solubility in the cathode material, as with hydrogen, can result in mechanical erosion due to micro-explosions near the cathode surface.
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    Water, air & soil pollution 85 (1995), S. 677-682 
    ISSN: 1573-2932
    Keywords: soils ; acidification ; ancient woodland ; nitrogen ; environmental change
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This study outlines the results of analysis of soil samples collected from fixed quadrats located in a regular pattern across Wytham Wood. Oxfordshire, England. The site contains plots of mixed deciduous ancient woodland and more recent plantations. A previous soil study was undertaken in 1974 and samples archived. Soils were resampled in 1991 and some re-analysis of the 1974 samples was undertaken. Soils were of a wide range in types from sands to gravels with a pH range of 3.0–7.0. Results showed some decline in pH in lower horizons, but most striking was a large increase in soil nitrogen for all horizons and soil types.
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  • 86
    ISSN: 1573-2932
    Keywords: air pollution ; sulphur ; nitrogen ; base cations ; throughfall ; Scots pine ; needle elements ; soil leachate ; N.-W. Russia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Bulk precipitation and throughfall analyses in 50–100-year-old Scots pine stands revealed decreasing sulphur, nitrogen, calcium and magnesium deposition gradients, which extend from the St. Petersburg-Leningrad region and N.-E. Estonia to S.-E. Finland. The Ca and Mg deposition alleviate the acidifying effect of sulphur and nitrogen. The Scots pine canopies acted as a sink for ammonium and nitrate, while the canopy interactions increased sulphur, calcium and magnesium content in throughfall. Foliar S, N and Ca concentrations correlated positively with the corresponding deposition loads. In contrast, low foliar magnesium concentrations were detected in the vicinity of St. Petersburg. The results indicate that the sulphur and calcium deposition may have increased soil leachate S and Ca concentrations in the most polluted Scots pine stands.
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    Journal of materials synthesis and processing 7 (1999), S. 311-319 
    ISSN: 1573-4870
    Keywords: Iron ; carbon ; nitrogen ; microstructure ; characterization ; HIP-drip
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new processing technique makes nitrogen alloying possible by adding nitrogen under elevated nitrogen pressure to prealloyed Fe-C ingots during continuous casting, producing a whole new class of precipitation-free, iron–carbon–nitrogen alloys. When both carbon and nitrogen bulk concentration levels exceeded 0.5 wt%, a duplex fcc-/(bcc-bct-) Fe microstructure resulted that is iron carbide- and nitride-free. With increasing carbon and nitrogen concentrations, there was an increase in the retained fcc-Fe phase. In cooling rate studies, increasing carbon and nitrogen concentrations shifted the knee of the fcc-Fe-to-bcc-Fe phase time–temperature–transformation (T–T–T) curve to longer times. Hardness, compression strength, and wear resistance increased with increasing carbon and nitrogen concentrations and were superior to iron–carbon alloys without the nitrogen addition.
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    Environmental and resource economics 10 (1997), S. 341-362 
    ISSN: 1573-1502
    Keywords: Baltic Sea ; eutrophication ; nitrogen ; phosphorus ; cost effective
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Notes: Abstract Due to eutrophication caused by heavy loads of nitrogen and phosphorus, the biological conditions of the Baltic Sea have been disturbed: large sea bottom areas without any biological life, low stocks of cods, and toxic blue green algaes. It is recognized that the nitrogen and phosphorus loads to the Baltic Sea must be reduced by 50% in order to restore the sea. The main purpose of this paper is to calculate cost effective nitrogen and phosphorus reductions to the Baltic Sea from the nine countries surrounding the Baltic Sea. The results show a significant difference in minimum costs of decreasing nitrogen and phosphorus loads to the Sea: approximately 12 000 millions of SEK per year and 3 000 millions of SEK respectively for reductions by 50%. It is also shown that a change from a policy of cost-effective nutrient reductions to a policy where each country reduces the nutrient loads by 50% increase total costs for both nitrogen and phosphorus reductions by about 300%. The results are, however, sensitive to several of the underlying assumptions and should therefore be interpreted with much caution.
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  • 89
    ISSN: 1573-1561
    Keywords: Piperidine alkaloids ; pinidine ; euphococcinine ; foliar chemistry ; nitrogen ; Pinus ponderosa ; Pinus contorta
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract We quantified 2,6-disubstituted piperidine alkaloids in Pinus ponderosa and P. contorta needles from three forest sites in April, June, August, and December. Alkaloids were detected on at least one date in 71% of the ponderosa pine and in 29% of the lodgepole pine trees sampled. Pinidine was the major alkaloid constituent of ponderosa pine, while euphococcinine was the predominant compound in lodgepole pine. For ponderosa pine, total alkaloid concentrations were very low at two sites on all dates. At the third site, concentrations were variable but significantly higher on all dates. Total alkaloid concentrations in previous-year foliage from this site were highest in April, then significantly lower from June through December. Current-year foliage collected in August and December had significantly higher alkaloid concentrations than previous-year foliage on the same dates. Variation in foliar nitrogen concentrations accounted for some of the alkaloid variation in current-year foliage sampled in August.
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  • 90
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    Water, air & soil pollution 85 (1995), S. 623-628 
    ISSN: 1573-2932
    Keywords: monitoring ; deposition ; sulphur ; nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The total deposition of sulphur (S) and nitrogen (N) components in Norway during the period 1988–1992 has been estimated on the basis of measurement data of air- and precipitation chemistry from the national monitoring network. There are large regional variations in depositions with highest values in the southwestern part of Norway. Time series analysis of annual mean concentrations of sulphur dioxide (SO2) and sulphate (SO4 −−) in air, non marine SO4 −−, nitrate (NO3 −) and ammonium (NH4 +) in precipitation, shows a significant reduction in the S concentrations both in air and precipitation. In precipitation the concentrations are reduced by 30–45 percent in Southern Norway and 45–55 percent in Central and Northern Norway. Even larger reductions are observed in air concentrations with 50–65 percent reduction in Southern Norway and 65–88 percent reduction further north. For N components there are generally no significant trends in concentration levels nor in precipitation or air. The observed trends are comparable with reported trends in emission.
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  • 91
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    Water, air & soil pollution 85 (1995), S. 1613-1622 
    ISSN: 1573-2932
    Keywords: Deposition ; ecosystem ; nitrogen ; Norway spruce ; nutrient cycling ; production ; root function ; sulphur
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In this paper we try to interpret results from different investigations where an ecosystem with Norway spruce was manipulated with increased N and S deposition via the soil system. The site, in Skogaby in Southwest Sweden, had 1989–93 an annual deposition of 9 kg NH4-N; 7 kg NO3-N and 20 kg SO4-S ha−1. The stand was treated during 6 years with 100 kg N and 114 kg S ha− y−1 in the form of ammonium sulphate (NS treatment). The stand reacted with increased above ground production of 31% after 3 years of treatment. The uptake above ground of N was 155 kg ha−1 higher than in the control. Those trends were even stronger after 6 years of treatment. There were no decreases in the uptake of P, K, Ca or Mg (but for B) after 3 or 6 years of NS-treatment. Needle macro nutrient concentrations in relation to N decreased for several nutrients due to dilution effects. As result of the NS treatment pH increased markedly in the litter layer, and less, but significantly, in the humus layer. A decrease in pH value by about 0.3 units was found in the rest of the soil profile down to 50 cm. Dry mass of needle litter fall and litter layer both increased as a result of 6 years of NS-treatment. After three years of treatment 77–80% of all living fine roots in both control and NS treatment were found in the humus layer and the upper 10 cm of the mineral soil. The amount of living fine roots in the humus layer of NS-treated trees decreased to about one third of the control, and the amount of dead fine roots increased by 150% compared with untreated trees after 6 years of treatment. It is argued that the decreased amount of living and increased amount of dead fine roots not necessarily are indications of decreased root vitality. It can also be explained by increased root turnover rate and decreased decomposition rates of N rich new and old fine root litter. No inorganic N was leached from the control plots whereas the NS treated plots started to leach NO3 the second year of treatment. During 1989–1993 a total of 44 kg NO3-N and 30 kg NH4-N per ha was lost from the system which means that 88% of the N supplied was retained by the ecosystem. At first SO4 was adsorbed in the soil, but after five years of treatment the output was almost equal to the input.
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  • 92
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    Water, air & soil pollution 85 (1995), S. 15-24 
    ISSN: 1573-2932
    Keywords: Acid deposition ; global change ; Asia ; fertilizer ; nitrogen ; sulfur
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Most acid-deposition investigations have been concerned with the impact of nitrogen oxides (NOx) and sulfur dioxide (SO2) emissions on Europe and North America. This paper examines three issues beyond this central focus. Major conclusions are 1) ammonia (NH3) emissions and subsequent nitrogen (N) accumulation in terrestrial ecosystems have the potential to generate significant acidification in terrestrial and aquatic ecosystems; 2) sulfur (S) and N accumulation in environmental reservoirs will not only result in significant and extensive acidification but will also impact the earth's radiation balance, tropospheric oxidizing capacity, ecosystem nutrient balance and groundwater quality; and 3) future emissions will substantially increase in the developing world, especially in Asia. By 2020, Asian emissions of SO2, NOx and NH3 will be equal to or greater than the combined emissions from Europe and North America.
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  • 93
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    Water, air & soil pollution 85 (1995), S. 101-110 
    ISSN: 1573-2932
    Keywords: carbon ; nitrogen ; sulfur ; biogeochemistry ; mitigation ; global change
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Forest systems cover more than 4.1×109 ha of the Earth's land area. The future response and feedbacks of forest systems to atmospheric pollutants and projected climate change may be significant. Boreal, temperate and tropical forest systems play a prominent role in carbon (C), nitrogen (N) and sulfur (S) biogeochemical cycles at regional and global scales. The timing and magnitude of future changes in forest systems will depend on environmental factors such as a changing global climate, an accumulation of CO2 in the atmosphere, and increase global mineralization of nutrients such as N and S. The interactive effects of all these factors on the world's forest regions are complex and not intuitively obvious and are likely to differ among geographic regions. Although the potential effects of some atmospheric pollutants on forest systems have been observed or simulated, large uncertainty exists in our ability to project future forest distribution, composition and productivity under transient or nontransient global climate change scenarios. The potential to manage and adapt forests to future global environmental conditions varies widely among nations. Mitigation practices, such as liming or fertilization to ameliorate excess NOx or SOx or forest management to sequester CO2 are now being applied in selected nations worldwide.
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  • 94
    ISSN: 1573-2932
    Keywords: forest soil ; leaching ; lysimeter ; nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Three years of N application to a Cambic arenosol (Typic Udorthent) in two lysimeter series, one with and one without young saplings of Pinus sylvestris L. have produced significant changes in soil solution and leachate chemistry. An application of 30 kg N/ha*yr−1 significantly increased NO3 − leaching from the soil. This N load was also sufficient to significantly increase the mobility of the phyto-toxic elements Al3+ and Mn2+, likewise to increase leaching of the important plant nutrients Ca2+, Mg2+ and K+. At a N load of 90 kg N/ha*yr−1 significant increase in NH4 + leaching was observed, but total leaching of NH4 + was still very low compared to NO3 − leaching. No significant treatment effects were found for SO4 2−, Fe2+ and Cl− in the leachate. Trees grown in the lysimeters buffered the acidifying effect of N application and increased the leachate pH by 0.2 pH units compared to lysimeters without trees.
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  • 95
    ISSN: 1573-2932
    Keywords: sitka spruce ; nitrogen ; deposition ; leaching ; proton production ; green spruce aphid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Studies of biogeochemical cycling and soil acidification have been carried out in even aged stands of Norway spruce, sitka spruce, Douglas fir, beech and oak under the frame of “The Element Cycling Project”. Deposition of excess nitrogen to forests is important as a potential acidifying input. In Denmark, reduced vitality in Norway spruce has promoted extensive planting of sitka spruce. However, several spruce aphid infestations have caused defoliation in many sitka spruce stands. The objectives of this study were to evaluate the effects of deposition and increased litterfall due to spruce aphid infestations on nitrogen transformations in the forest floor in sitka spruce stands on different soil types. The deposition of throughfall nitrogen range from 19 to 35 kg/ha/year. Fluxes of nitrogen in litterfall ranged from 21 to 77 kg/ha/year, whereas nitrogen leaching range from 1 to 57 kg/ha/year. Leaching was lowest at the infertile sites, but increased with magnitude of deposition and aphid infestations. Proton production according to the nitrogen transformations was largest at the fertile site most often affected by infestations. Huge amounts of bird droppings, honey dew and input of easily available nutrients by canopy leaching probably induced litter decomposition and formation of NO 3 − in the soil water.
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  • 96
    ISSN: 1573-2932
    Keywords: atmospheric deposition ; high elevation forests ; foliar uptake ; cloudwater ; nitrogen ; sulphur
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract From 1986–1989, a team of scientists measured atmospheric concentrations and fluxes in precipitation and throughfall, and modeled dry and cloudwater deposition in a spruce-fir forest of the Great Smoky Mountains National Park which is located in the Southern Appalachian Region of the United States. The work was part of the Integrated Forest Study (IFS) conducted at 12 forests in N. America and Europe. The spruce-fir forest at 1740 m consistently received the highest total deposition rates (∼2200, 1200, and 700 eq ha−1 yr−1 for SO4 2−, NO3 −, and NH4 +). During the summers of 1989 and 1990 we used multiple samplers to measure hydrologie, SO4 2−, and NO3 − fluxes in rain and throughfall events beneath spruce forests above (1940 m) and below (1720 m) cloud base. Throughfall was used to estimate total deposition using relationships determined during the IFS. Although the SO4 2− fluxes increased with elevation by a factor of ∼2 due to higher cloudwater interception at 1940 m, the NO3 − fluxes decreased with elevation by ∼30%. To investigate further, we began year round measurements of fluxes of all major ions in throughfall below spruce-fir forests at 1740 m and at 1920 m in 1993–1994. The fluxes of most ions showed a 10–50% increase with elevation due to the ∼70 cm yr−1 cloudwater input at 1920 m. However, total inorganic nitrogen exhibited a 40% lower flux in throughfall at 1920 m than at 1740 m suggesting either higher dry deposition to trees at 1740 m or much higher canopy uptake of nitrogen by trees at 1920 m. Differential canopy absorption of N by trees at different elevations would have significant consequences for the use of throughfall N fluxes to estimate deposition. We used artificial trees to understand the foliar interactions of N.
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  • 97
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    Water, air & soil pollution 85 (1995), S. 1765-1770 
    ISSN: 1573-2932
    Keywords: nitrogen ; sulphur ; input ; forested catchment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The study covers 1991–1994 concentrations of SO2 and NO2 in the air, concentrations of sulphur and nitrogen in bulk precipitation, throughfall and stemflow as well as input of S and N to the Ratanica forested catchment (S. Poland), which is exposed to moderate anthropogenic pollution are presented. There was high input of sulphur (26 kg ha−1) and nitrogen (24 kg ha−1) to the catchment, mainly in NH4+ (18 kg ha−1). The significant contribution of NH4 + connected with intensive agriculture in surrounding fields has led to eutrophication of the ecosystem.
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  • 98
    ISSN: 1573-2932
    Keywords: atmospheric deposition ; ecosystem ; hydrology ; nitrogen ; sulfur
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Information on atmospheric inputs, water chemistry and hydrology were combined to evaluate elemental mass balances and assess temporal changes in elemental transport from 1983 through 1992 for the Arbutus Lake watershed. This watershed is located within a northern hardwood ecosystem at the Huntington Forest within the central Adirondack Mountains of New York (USA). Changes in water chemistry, including increasing NO3 − concentrations (1.1 μmol c , L−1 yr-1), have been detected during this study period. Starting in 1991 hydrological flow has been measured from Arbutus Lake and these measurements were compared with predicted flow using the BROOK2 hydrological simulation model. The model adequately (r2=0.79) simulated flow from this catchment and was used to estimate drainage for earlier periods when direct hydrological measurements were not available. Modeled drainage water losses coupled with estimates of wet and dry atmospheric deposition were used to calculate solute budgets. Export of SO4 2− (831 mol c ha−1 yr−1) from the greater Arbutus Lake watershed exceeded estimates of atmospheric deposition in an adjacent hardwood stand suggesting an additional source of S. These large drainage losses of SO4 2− also contributed to the drainage fluxes of basic cations (Ca2+, Mg2+, K+ and Na+). Most of the atmospheric inputs of inorganic N were retained (average of 74% of wet precipitation and 85% total deposition) in the watershed. There were differences among years (56 to 228 mol ha−1 yr−1) in drainage water losses of N with greatest losses occurring during a warm, wet period (1989–1991).
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  • 99
    ISSN: 1573-2932
    Keywords: Pulp and paper mill sludge ; nitrogen ; DOC ; heavy metals ; water quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Primary sludge, secondary sludge, and wood ash from a pulp and paper mill were combined with sand to create a synthetic topsoil (C:N ratio of 18:1) to restore an abandoned gravel pit. Synthetic topsoil was applied to field microcosms at rates equivalent to 0, 2170, 4341, or 6511 kg N/ha; each was seeded with grass. Fifteen chemical constituents in leachate were measured during two field seasons. Cadmium, Ni and Zn were mobilized rapidly by soil disturbance. Chloride and SO4-S eluted rapidly from the sludge along with Na. Nitrate leached with Ca late in each field season when sludge N-mineralization and nitrification exceeded plant uptake and microbial immobilization. Ammonium elution was negligible. Dissolved organic carbon (DOC) was mobilized by decomposition of organic matter in the sludge, as were Mg and K. Copper eluted with DOC, probably as an organic ligand. Lead and ortho-P were below our detection limits. We concluded that a synthetic topsoil with a 30:1 C:N ratio applied at a rate of 2100-4300 kg N/ha should provide adequate plant nutrition while minimizing water quality hazards.
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  • 100
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    Water, air & soil pollution 99 (1997), S. 477-486 
    ISSN: 1573-2932
    Keywords: sediment ; nitrogen ; phosphorus ; organic matter ; cluster analysis ; Gulf of Finland ; estuaries
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Dry weight (DW), ignition loss (IL) and concentrations of total nitrogen (TN) and total phosphorus (TP) of the sediment surface layer (0 to 10 cm, 1 cm slices) were analyzed from 20 sites in the eastern Gulf of Finland. The distance of the sampling sites from the mouth of the River Neva explained the nutrient concentrations of the sediments well, while the effect of water depth was negligible. The increase of TN and the decrease of TP along the transect from the river mouth towards the open Gulf were caused by the diminishing share of allochthonous material supplied from the River Neva. The mean TN concentration of the different accumulation areas was about 40 % higher in the sediment surface than in the deeper layer (9 to 10 cm). The corresponding difference for TP varied from 53 to 56 %. The results suggest considerable netflux of nutrients from sediment to water. The net sediment accumulation of nutrients were estimated as 6.0 g m-2 a-1 of N and 1.7 g m-2 a-1 of P corresponding 22 000 t a-1 of N and 6 100 t a-1 of P for the whole eastern Gulf.
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