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  • 1
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    Ecology. Soil fertility and hunger in Africa (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-03-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanchez, Pedro A -- New York, N.Y. -- Science. 2002 Mar 15;295(5562):2019-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉International Center for Research in Agroforestry, Post Office Box 30677, Nairobi, Kenya. P.sanchez@cgiar.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11896257" target="_blank"〉PubMed〈/a〉
    Keywords: Africa South of the Sahara ; Agriculture/*methods ; Biomass ; Crops, Agricultural/*growth & development ; *Ecosystem ; Fertilizers ; *Food Supply ; Forestry ; Humans ; Hunger ; Nitrogen ; Nitrogen Fixation ; Phosphates ; Plant Development ; Public Policy ; *Soil ; Trees/growth & development ; United Nations ; Zea mays/growth & development
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    A smarter way to combat hunger (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-03-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanchez, Pedro A -- England -- Nature. 2009 Mar 12;458(7235):148. doi: 10.1038/458148a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Earth Institute at Columbia University, 61 Route 9W, Palisades, New York 10964, USA. psanchez@ei.columbia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19279615" target="_blank"〉PubMed〈/a〉
    Keywords: *Agriculture/economics/methods ; Food/economics ; Humans ; *Hunger ; *International Cooperation ; *Public Policy ; United Nations
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    Monitoring the world's agriculture (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-07-31
    Description: To feed the world without further damaging the planet, Jeffrey Sachs and 24 foodsystem experts call for a global data collection and dissemination network to track the myriad impacts of different farming practices.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sachs, Jeffrey -- Remans, Roseline -- Smukler, Sean -- Winowiecki, Leigh -- Andelman, Sandy J -- Cassman, Kenneth G -- Castle, David -- DeFries, Ruth -- Denning, Glenn -- Fanzo, Jessica -- Jackson, Louise E -- Leemans, Rik -- Lehmann, Johannes -- Milder, Jeffrey C -- Naeem, Shahid -- Nziguheba, Generose -- Palm, Cheryl A -- Pingali, Prabhu L -- Reganold, John P -- Richter, Daniel D -- Scherr, Sara J -- Sircely, Jason -- Sullivan, Clare -- Tomich, Thomas P -- Sanchez, Pedro A -- England -- Nature. 2010 Jul 29;466(7306):558-60. doi: 10.1038/466558a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Earth Institute, Columbia University.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20671691" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/*methods/trends ; Conservation of Natural Resources/*trends ; Cost-Benefit Analysis ; *Data Collection ; *Environment ; Food Supply ; Information Dissemination ; International Cooperation
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
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    Agriculture. Nutrient imbalances in agricultural development (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-06-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vitousek, P M -- Naylor, R -- Crews, T -- David, M B -- Drinkwater, L E -- Holland, E -- Johnes, P J -- Katzenberger, J -- Martinelli, L A -- Matson, P A -- Nziguheba, G -- Ojima, D -- Palm, C A -- Robertson, G P -- Sanchez, P A -- Townsend, A R -- Zhang, F S -- New York, N.Y. -- Science. 2009 Jun 19;324(5934):1519-20. doi: 10.1126/science.1170261.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Stanford University, Stanford, CA 94305, USA. vitousek@stanford.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19541981" target="_blank"〉PubMed〈/a〉
    Keywords: *Agriculture/methods ; China ; Environmental Pollution ; Fertilizers ; Kenya ; Nitrogen ; Phosphorus ; *Soil ; United States ; *Zea mays/growth & development
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Environmental science. Digital soil map of the world (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-08-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanchez, Pedro A -- Ahamed, Sonya -- Carre, Florence -- Hartemink, Alfred E -- Hempel, Jonathan -- Huising, Jeroen -- Lagacherie, Philippe -- McBratney, Alex B -- McKenzie, Neil J -- Mendonca-Santos, Maria de Lourdes -- Minasny, Budiman -- Montanarella, Luca -- Okoth, Peter -- Palm, Cheryl A -- Sachs, Jeffrey D -- Shepherd, Keith D -- Vagen, Tor-Gunnar -- Vanlauwe, Bernard -- Walsh, Markus G -- Winowiecki, Leigh A -- Zhang, Gan-Lin -- New York, N.Y. -- Science. 2009 Aug 7;325(5941):680-1. doi: 10.1126/science.1175084.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Earth Institute at Columbia University, 61 Route 9W, Palisades, NY 10964, USA. psanchez@ei.columbia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19661405" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; Climate ; *Databases, Factual ; *Ecology ; Ecosystem ; Environment ; Humans ; *Soil/analysis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    Radically rethinking agriculture for the 21st century (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-02-13
    Description: Population growth, arable land and fresh water limits, and climate change have profound implications for the ability of agriculture to meet this century's demands for food, feed, fiber, and fuel while reducing the environmental impact of their production. Success depends on the acceptance and use of contemporary molecular techniques, as well as the increasing development of farming systems that use saline water and integrate nutrient flows.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3137512/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3137512/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fedoroff, N V -- Battisti, D S -- Beachy, R N -- Cooper, P J M -- Fischhoff, D A -- Hodges, C N -- Knauf, V C -- Lobell, D -- Mazur, B J -- Molden, D -- Reynolds, M P -- Ronald, P C -- Rosegrant, M W -- Sanchez, P A -- Vonshak, A -- Zhu, J-K -- R01 GM059138/GM/NIGMS NIH HHS/ -- R01 GM059138-15/GM/NIGMS NIH HHS/ -- R01 GM070795/GM/NIGMS NIH HHS/ -- R01 GM070795-09/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Feb 12;327(5967):833-4. doi: 10.1126/science.1186834.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Office of the Science and Technology Adviser to the Secretary of State and to the Administrator of USAID, U.S. Department of State, Washington, DC 20520, USA. fedoroff@state.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20150494" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/legislation & jurisprudence/methods/*trends ; Aquaculture/methods/trends ; Biotechnology ; Climate Change ; *Crops, Agricultural ; Food, Genetically Modified ; Government Regulation ; Population Growth ; Private Sector ; Public Sector ; United States ; United States Department of Agriculture
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Public health. Cutting world hunger in half (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-01-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanchez, Pedro A -- Swaminathan, M S -- New York, N.Y. -- Science. 2005 Jan 21;307(5708):357-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Earth Institute at Columbia University, New York, NY 10964, USA. sanchez@iri.columbia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15661994" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; Commerce ; *Global Health ; Humans ; *Hunger ; Income ; International Cooperation ; Malnutrition/epidemiology/*prevention & control ; Nutritional Physiological Phenomena ; Politics ; Poverty/prevention & control ; *Public Health ; Public Policy
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Real time Markov chains: Wind states in anemometric data (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-03-04
    Description: The description of wind phenomena is frequently based on the data obtained from anemometers, which usually report the wind speed and direction only in a horizontal plane. Such measurements are commonly used either to develop wind generation farms or to forecast weather conditions in a geographical region. Beyond these standard applications, the information contained in the data may be richer than expected and may lead to a better understanding of the wind dynamics in a geographical area. In this work, we propose a statistical analysis based on the wind velocity vectors, which we propose may be grouped in “wind states” associated with binormal distribution functions. We found that the velocity plane defined by the anemometric velocity data may be used as a phase space, where a finite number of states may be found and sorted using standard clustering methods. The main result is a discretization technique useful to model the wind with Markov chains. We applied such ideas in the anemometric data for two different sites in Mexico where the wind resource is considered reliable. The approximated Markov chains of both places give a set of values for transition probabilities and residence times that may be regarded as a signature of the dynamics of the site.
    Electronic ISSN: 1941-7012
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by American Institute of Physics (AIP)
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  • 9
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    Amazon basin soils: management for continuous crop production (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-05-21
    Description: Technology has been developed which permits continuous production of annual crops in some of the acid, infertile soils of the Amazon Basin. Studies in Yurimaguas, Peru, show that three grain crops can be produced annually with appropriate fertilizer inputs. Twenty-one crops have been harvested during the past 8(1/2) years in the same field, with an average annual production of 7.8 tons of grain per hectare. Soil properties are improving with continuous cultivation. The technology has been validated by local farmers, who normally practice shifting cultivation. Economic interpretations indicate large increases in annual family farm income and a high return on the investment of chemical inputs. Other promising land use alternatives include low-input crop production systems, paddy rice production in fertile alluvial soils, and pastures or agroforestry in rolling areas. Stable, continuous food crop production is an attractive alternative to shifting cultivation in humid tropical regions experiencing severe demographic pressures. For each hectare of land managed in a highly productive manner, there may be less need for clearing additional tropical forests to meet food demands.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanchez, P A -- Bandy, D E -- Villachica, J H -- Nicholaides, J J -- New York, N.Y. -- Science. 1982 May 21;216(4548):821-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17819134" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Low-input cropping for Acid soils of the humid tropics (1987)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1987-12-11
    Description: A low-input cropping system has been developed at Yurimaguas, Peru, to serve as a transition technology between shifting and continuous cultivation for acid soils of the humid tropics. Principal features are slash-and-burn clearing, rotation of acid-tolerant upland rice and cowpea cultivars, maximum residue return, no tillage, and no lime or fertilizer applications. When yields decline as a result of increasing weed pressure and nutrient deficiencies, a kudzu fallow is grown for 1 year. Subsequent options include fertilizer-based continuous cultivation, pastures, or agroforestry. The system preserves some agroecosystem diversity and contributes toward a sustainable level of production and income for farmers in humid tropical regions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanchez, P A -- Benites, J R -- New York, N.Y. -- Science. 1987 Dec 11;238(4833):1521-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17784289" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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