ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (17)
  • maize  (17)
  • 1985-1989  (17)
  • 1950-1954
  • 1989  (17)
  • 1950
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (17)
Collection
  • Articles  (17)
Source
Keywords
Publisher
Years
  • 1985-1989  (17)
  • 1950-1954
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Phosphorus and mycorrhizal interaction on uptake of P and trace elements by maize (1989)
    Springer
    Nutrient cycling in agroecosystems 21 (1989), S. 19-22 
    Details
    ISSN: 1573-0867
    Keywords: VAM fungi ; phosphorus ; molybdenum ; interaction ; maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Vesicular arbuscular mycorrhizal fungi (VAM) when applied to soils can result in marked increases in plant growth and P uptake. Application of molybdenum can also result in a synergistic interaction with phosphorus, with reslutant increases in plant dry matter production. The current investigation was designed to evaluate P X Mo X VAM interactions on yield and P uptake of sweet corn (Zea mays L.) The experiment was conducted in the greenhouse using soils from Missouri and Jamaica (West Indies) which were very low in available soil P. Corn was grown in pots amended with P and VAM, with and without Mo. Colonizing Jamaican soil amended with P withGlomus etunicatum increased shoot dry matter weights significantly. Greatest P uptake occured in treatments receiving the highest application of P and mycorrhizal inoculation. There was a significant difference between the two soils with respect to treatment effects on micronutrient accumulation of the test crop. The decreases in Cu, Zn, Mn, and Mo concentration of corn leaves between control and the treated pots, is attributed to dry matter dilution effect. The results indicated that mycorrhizal inoculation increased the dry matter significantly in Jamaican soil amended with P, however not in Missouri soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01054731
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Shortened bush fallow rotations with relay-cropped Inga edulis and Desmodium ovalifolium in wet central Amazonian Peru (1989)
    Springer
    Agroforestry systems 8 (1989), S. 173-196 
    Details
    ISSN: 1572-9680
    Keywords: bush fallow ; agroforestry ; Inga edulis ; Desmodium ovalifolium ; shifting cultivation ; wet tropics ; sustainable system ; maize ; cassava ; plantain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In the Palcazu Valley alluvial Inceptisols are relay-cropped with maize-cassavaplantain in rotation with 2–5 years of tree fallow. These lands, of limited extent, yet important for Yanesha Indian subsistence production, are being cropped even more intensively as population increases and land is converted to other uses. The relay-planting of the tree-thicket combination Inga edulis with Desmodium ovalifolium into the on-farm crop sequence was evaluated as a means to accelerate fallow recovery and thereby shorten fallow rotations. Three experiments with Inga/Desmodium planted with cassava-plantain and one with rice under different weeding regimes after a Desmodium fallow were conducted. Inga and Desmodium were not chopped back or pruned during these experiments. Desmodium/Inga suppressed herbaceous weeds from one year after planting. Desmodium/Inga accumulated more woody biomass than natural fallows. Cassava yields were unaffected by the presence of Desmodium/Inga, while plantain yields were greater under Desmodium/Inga compared to natural weeds. Desmodium/Inga, while promising for shortening fallow rotations, demonstrated potential difficulties: increased labor for establishment, tendency of Desmodium to weediness in later crop cycles, and suppression of the natural regeneration of trees and shrubs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00123120
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Agroforestry systems and soil surface management of a tropical alfisol: I: Soil moisture and crop yields (1989)
    Springer
    Agroforestry systems 8 (1989), S. 7-29 
    Details
    ISSN: 1572-9680
    Keywords: No-till ; plow-till ; cowpea ; maize ; oxygen diffusion rate ; allelopathy ; alley cropping ; sustainable agriculture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Field experiments were conducted on a tropical Alfisol at Ibadan, Nigeria, to evaluate the effects on soil moisture and crop yields of three agroforestry systems. Effects of agroforestry treatments involving two perennial shrubs (Leucaena leucocephala and Gliricidia sepium), each at 2-m and 4-m row spacings, were compared with no-till and plow-till systems of seedbed preparation. Measurements were made for soil properties, runoff and erosion, nutrient losses in runoff, and crop growth and yield for a uniform maize (Zea mays) and cowpea (Vigna unguiculata) rotation. All of the six plots, each measuring 70 × 10m, were established on a natural slope of about 7%. Alterations in soil properties and effects on crop growth were evaluated for six consecutive years from 1982 through 1987. Seed germination and seedling establishment of Leucaena hedgerows were satisfactory while establishment of Gliricidia from stem cuttings was unsatisfactory. Maize germination and crop stand were normal while that of cowpea were suppressed by both Leucaena and Gliricidia. Maize growth and yield were suppressed only in the vicinity of hedgerows. Maize grain yield in agroforestry systems averaged about 10 percent lower than that of the control. In contrast with maize, agroforestry systems drastically suppressed cowpea grain yield. The average cowpea yield in agroforestry systems was 30 to 50% of the control. Regardless of the mangement system, grain yields declined over time at the rate of 340 and 96 kg ha−1yr−1 for maize and cowpea, respectively. Hedgerows of Leucaena and Gliricidia acted as windbreaks. Consequently, soil moisture content in the top 0–5 cm layer in agroforestry systems was generally higher than that in the control during both wet and dry seasons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00159066
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Identification of rhizobacteria from maize and determination of their plant-growth promoting potential (1989)
    Springer
    Plant and soil 115 (1989), S. 7-11 
    Details
    ISSN: 1573-5036
    Keywords: rhizobacteria ; plant growth-promoting rhizobacteria activity ; maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract During the growing season of 1986, the rhizobacteria (including organisms from the ectorhizosphere, the rhizoplane and endorhizosphere) of 20 different maize hybrids sampled from different locations in the Province of Quebec were inventoried by use of seven different selective media. Isolates were characterized by morphological and biochemical tests and identified using the API20E and API20B diagnostic strips.Pseudomonas spp. were the prominent bacteria found in the rhizoplane and in the ectorhizosphere.Bacillus spp. andSerratia spp. were also detected, but in smaller numbers. In the endorhizosphere,Bacillus spp. andPseudomonas spp. were detected in order of importance. Screening for plant growth-promoting rhizobacteria was carried out in three soils with different physical and chemical characteristics. The results depended on the soil used, but two isolates (Serratia liquefaciens andPseudomonas sp.) consistently caused a promotion of plant growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02220688
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Relationship between root elongation rate and diameter and duration of growth of lateral roots of maize (1989)
    Springer
    Plant and soil 119 (1989), S. 271-279 
    Details
    ISSN: 1573-5036
    Keywords: axile root ; maize ; root diameter ; lateral root ; rhizotron ; root elongation rate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The objective of this work was to describe the relationship between elongation rate and diameter of maize roots and to estimate the length and growth duration of lateral roots of maize. Diameters and elongation rates of roots were measuredin situ on plants grown 5 weeks in small rhizotrons under greenhouse conditions. At the end of the experimental period the roots were harvested and diameters of axile and lateral roots were measured. The frequency distribution of diameters of harvested roots was bimodal with a minimum at 0.6 mm; 97% of axile roots were larger than this value and 98% of the lateral roots were smaller. Root elongation per day increased as diameter increased but the slope of the relationship with lateral roots was about 2.5 times that with axile roots when separate linear regressions were fitted to the two populations. The length of lateral roots found on axillary roots between the base and about 30 cm from the apex was approximately 2.2 cm. All of the data was consistent with the hypothesis that the lateral roots grew for about 2.5 days and then ceased growing. The axillary roots continued to grow throughout the experimental period at a rate of about 3 cm day−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370419
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Stimulating effects of foliar K-fertilizer applied at the appropriate stage of development of maize: A new way to increase yield and improve quality (1989)
    Springer
    Plant and soil 120 (1989), S. 111-124 
    Details
    ISSN: 1573-5036
    Keywords: chlorophyll ; foliar K fertilizer ; grain ; K-salts ; maize ; protein ; spraying site ; sweetness ; yields
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A series of eight experiments was conducted using large pots to (1) find the most effective date, site, concentration of K-solution and K-salt for foliar K-fertilization of maize plants (Zea mays, L.) grown with sufficient K-supply in soil, (2) explain why maize responded to the K-treatment, and (3) examine the influence of various levels of N and P supplies on the effectiveness of K-fertilizer via the leaves. A single spraying on sweet maize and field maize on any day between 50% tasselling date to 10 days after tasselling shortened maturity date, increased grain yield, stover yield, grain-stover ratio, absorption of N, P, K, Ca and Mg, sweetness of young grain (of sweet maize), and crude protein content of grain. However spraying on the third day after 50% tasselling was most effective. The second application later than 7 days after the 50% tasselling date suppressed the effects of spraying on the most effective date. In application of many repetitive sprayings covering the most effective date, a spraying program with late spraying could reduce grain yield. KNO3, 2.5% KNO3-solution, and applications on all aerial parts were found to be the most effective. Increases in grain yield for spraying on all aerial parts, spraying on ear leaf only, spraying on all leaves above ear leaf and applying K to soil were 74%, 51%, 41% and 23%, respectively. The foliar K-fertilization affected maize by stimulating chlorophyll synthesis and not by increasing leaf area. A balance in N and K supplies was determined to be effective for the K-fertilization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370297
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    A model to predict the zinc status of soils for maize (1989)
    Springer
    Plant and soil 116 (1989), S. 49-55 
    Details
    ISSN: 1573-5036
    Keywords: alluvial soils ; environmental conditions ; maize ; soil properties ; soil Zn status ; soil Zn tests
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The objective of this study, carried out over 2 years, was to evaluate the effect of soil properties on the response of maize (Zea mays L.) to zinc applications and relate these properties to soil test Zn for predicting the Zn status of soils considering the effect of environmental conditions. The relative yield, expressed as an index of crop response, was related through multiple regression to CEC (or clay), electrical conductivity (or exchangeable Na), and bulk density consistently throughout the two year period that included one relatively wet, cool and cloudy growing season when variations in relative yield were explained also by 0.5M NaHCO3-extractable-P and organic C. A procedure is presented to establish limits for the soil propeties and soil-test-extractable-Zn and to meaningfully combine them into a model to predict soil Zn status. A model that combined soil test Zn, texture and electrical conductivity was satisfactory for the purpose of prediction and for adoption for soil testing on a routine basis. The suggested approach may be suitable for designing models with soil properties associated with crop responses to micronutrients in other situations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02327256
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Yield response to honeycomb selection in maize (1989)
    Springer
    Euphytica 40 (1989), S. 43-48 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays ; maize ; plant selection ; selection efficiency ; direct and correlated responses ; positive skewness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary This research evaluated the response to three cycles of mass honeycomb selection based on the grain yields of widely-spaced plants from the F2 generation of a maize (Zea mays L.) single cross hybrid. Frequency distributions of individual plant yields in the selection plots showed strong positive skewness. A significant linear yield increase of 11.23% per cycle compared to the check was obtained. Correlated responses were the significant reduction in days to mid-silking, increases in ear and plant heights and in prolificacy. The selected population was similar to the original hybrid in days to mid-silking, ear and plant heights, but had significantly more ears per plant. It is concluded that mass honeycomb selection at wide spacings was effective in improving grain yield and prolificacy but may produce correlated responses in some other agronomic traits similar to those obtained with other selection schemes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023295
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    The yield stability of CIMMYT'S maize germplasm (1989)
    Springer
    Euphytica 40 (1989), S. 245-251 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays ; maize ; multilocation trials ; yield stability ; principal coordinates analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Principal coordinates analysis was used to determine the yield stability of some CIMMYT maize populations (Zea mays L.) measured by the performance of the varieties selected from them. The varieties included in this study were derived from subtropical of early and intermediate maturity maize populations. The analyses included grain yield data from international trials conducted from 1979 to 1983. Results show that varieties selected from the population Blanco Subtropical were stable in low yielding sites. Of the populations considered in this study, Amarillo Bajio and ETO-Illinois produced a greater number of varieties that give stable yields under both favourable and unfavourable environmental conditions. Some selections based on multilocational data showed good stability across years in both low and high yielding sites; however, across location varieties were not always more stable than specific site selections. Varieties formed in Tlaltizapan (Mexico), and Chuquisaca (Bolivia) were very stable in other regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024519
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Synchronization of flowering in maize (Zea mays L.) by the genetic system pg11 pg12 (1989)
    Springer
    Euphytica 41 (1989), S. 129-134 
    Details
    ISSN: 1573-5060
    Keywords: Zea mais ; maize ; pg11 pg12 ; near-isolines ; hybrid seed ; flowering synchronization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The mutant genotype pg11pg11 pg12pg12-epistasis of double recessive factors-determines greater precocity of flowering. The possibility of using this mutant in the production of hybrid seed as a mean of synchronizing flowering in parent strains of different earliness is studied. The differences between mutant and green control genotypes in the characters of days to pollen shedding, pollen production, and height of plants are evaluated. Four mutant lines are considered together with their respective green near-isolines in two distinct localities and across four successive plantings. The mutant near-isolines presented lower values than those of the green near-isolines for all the characters. The maximum reductions in days to flowring were obtained in early plantings and late maturity strains. The reduction in pollen production was about 50%. The reduced height of the mutants is explained, at least in part, by the correlation of this factor with days to flowering. The mutants did not prove to be more sensitive to the environment than their green near-isolines. Seed production was not studied since the mutant is very deficient for this character and it could therefore only be utilized as the male parent. We concluded that the mutant, could be used to synchronize flowering in the industrial production of hybrid seed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022422
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 11
    Electronic Resource
    Electronic Resource
    Testcross performance of maize lines from backcross populations containing highland Mexican or highland Peruvian germplasm (1989)
    Springer
    Euphytica 41 (1989), S. 263-272 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays ; maize ; backcrossing ; exotic germplasm ; highland tropical germplasm ; genetic recombination ; testcrossing ; grain yield ; grain moisture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Backcross populations of maize (Zea mays L.) were produced by crossing the early maturing inbred line W153R with the highland Mexican race Cónico then backcrossing to W153R (Q1 population) and by crossing W153R with the highland Peruvian race San Gerónimo then backcrossing to W153R (Q3 population). The populations were recombined by one generation of random mating. Testcrosses were produced from S0 plants in the original and recombined versions and these were evaluated in New Zealand for grain yield, grain moisture and other traits. Unexpected changes occurred during recombination for increased grain yield in the Q1 population and for decreased grain moisture in the Q3 population. This indicates strong, unplanned selection. Many testcrosses were higher yielding than check hybrids of W153R, but most were later maturing. S1 lines selected for high grain yield and acceptable grain moisture in testcrosses were advanced to the S2 generation and re-tested. All produced testcrosses with lower grain moisture than late maturing hybrid checks. Testcross grain yields of one Q1 line were equivalent to those of late maturing checks and its testcross had a lower grain moisture. The high yield potential of hybrids of this line was confirmed in the S4 generation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021593
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 12
    Electronic Resource
    Electronic Resource
    R-nj aleurone color selection and grain-filling responses in opaque-2 maize (1989)
    Springer
    Euphytica 43 (1989), S. 269-274 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays ; maize ; anthocyanin ; correlated response ; kernel weight ; mass selection ; protein quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Field experiments were conducted to determine which grain-filling characteristics were affected by the o2 gene and whether mass selection for degree of aleurone anthocyanin pigmentation controlled by R-nj could improve the grain-fill deficiencies associated with the o2 (opaque) phenotype of a mazie (Zea mays L.) synthetic (NDSE). Divergent mass selection was used to develop high color (HC), low color (LC), and randomly sampled (RC) check substrains. Lag phase duration (LPD), effective filling period (EFPD), and rate of dry matter accumulation (RDMA) for both opaque and normal dent phenotypes of third cycle HC, LC, and RC substrains were evaluated at three N fertility levels for each of two years at Fargo. Normal (O2) pollen produced heavier kernels than o2 pollen at all N rates in 1982. Over years, O2 pollinations averaged 11% longer EFPDs than o2 pollinations, but LPDs were usually longer for o2 pollinations. HC strains averaged 5.6% higher RDMA than RC strains across pollen types while LC strains had higher RDMA than RC strains only for O2 pollinations. These results indicate that selection for LC improved several traits which were deficient in opaque-2 maize and that use of the R-nj gene may be useful in improving opaque-2 maize.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023063
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 13
    Electronic Resource
    Electronic Resource
    Examination of methods for choosing locations for preliminary maize yield testing (1989)
    Springer
    Euphytica 44 (1989), S. 173-180 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays ; maize ; test locations ; overall performance ; predictive potential of location
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The costs associated with yield testing cause maize (Zea mays L.) breeders to search for ways to maximize testing efficiency. The objective of this study was to select individual locations, or a group of locations as preliminary testing sites for yield evaluation of maize hybrids within FAO 600 maturity zone in Yugoslavia. Yield data for 12 locations obtained for the period 1975 to 1984 were used. The predictive potential of the site was judged by the correlations between location means and overall mean (r〉0.95), linear regression of locations means on overall mean (b〉1.0) and percentage of the 10% overall highest yielding hybrids selected by 10% selection intensity at each location, or at the group of locations (Is〉80%). Also factors as average location yield (x) and variation in individual location yield during the period of 10 years (CV) were related to the predictive potential of the site. Differences among locations in all criteria were found. Average yielding locations had higher values of estimators of predictive ability of overall performance than low yielding locations. None of individual locations satisfied all requested criteria. Five locations with highest values for each individual criterion were selected and all possible two, three, four and five-location combinations among them studied. Combinations of two locations could be used for very preliminary screening of hybrids by applying mild selection intensity. A more accurate prediction of overall one-year performance requires an evaluation of hybrids in a minimum of three, but frequently four, selected locations. However, for precise estimation of over-year hybrid performance, testing the hybrids at selected locations in more than one year is necessary.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022614
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 14
    Electronic Resource
    Electronic Resource
    Sunflower and maize transorganal tissue pH gradients and problems related to the ion transport mechanisms (1989)
    Springer
    Plant and soil 113 (1989), S. 144-146 
    Details
    ISSN: 1573-5036
    Keywords: ion transport mechanisms ; maize ; sunflower ; transorganal pH gradients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Transorganal gradients in the pH values, increasing in the root〈stem〈leaves direction, were found in a study of the tissue pH of individual organs of sunflower and maize plants. The relationship of these pH gradients to metabolism was established by investigating nitrate reductase activity (NRA) distribution among organs and the excretion of H+ by intact plants when exposed for various time periods (h) in distilled water and KNO3 solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181935
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 15
    Electronic Resource
    Electronic Resource
    A simulation model of the three-dimensional architecture of the maize root system (1989)
    Springer
    Plant and soil 119 (1989), S. 147-154 
    Details
    ISSN: 1573-5036
    Keywords: architecture ; maize ; mathematical model ; root growth ; root development ; simulation model ; spatial distribution ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In order to study the nutrient and water uptake of rootsin situ, we need a quantitative three-dimensional dynamic model of the root system architecture. The present model takes into account current observations on the morphogenesis of the maize root system. It describes the root system as a set of root axes, characterised by their orders and their inter-node of origin. The evolution of the simulated pattern is achieved by three processes, occuring at each time step: emission of new primary root axes from the shoot, growth and branching of existing root axes. The elongation of an axis depends on its order, inter-node and local growing conditions. Branches appear acropetally at a specified distance from the apex and from former branches, along ranks facing xylem poles, with a branching angle specific to their order and inter-node. From the three-dimensional branched patterns simulated by the model, various outputs, such as root profiles or cross-section maps can be computed, compared to observed data and used as inputs in uptake models. A number of examples of such possible outputs are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370279
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 16
    Electronic Resource
    Electronic Resource
    Influence of endosperm texture on milling, chemical composition and nutritive quality in maize (1989)
    Springer
    Plant foods for human nutrition 39 (1989), S. 235-243 
    Details
    ISSN: 1573-9104
    Keywords: maize ; endosperm texture ; milling ; rancidity ; semolina ; process-flour ; utilisable protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Three maize varieties namely Vijay, SO/SN composite and Shakti, which differ in their nutritional quality and endosperm texture were processed to prepare semolina (sooji) and process-flour. The nutritional quality of these products was determined and compared with whole kernel flour of the respective variety. Distinct differences in milling and chemical composition of three varieties were recorded. In quality evaluation tests lysine and tryptophan content, biological value and true digestibility were better in semolina and process-flour. Moreover, decrease in acid value in semolina and process-flour compared with whole maize flour recorded in all the varieties suggested improvement in shelf-life.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01091934
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 17
    Electronic Resource
    Electronic Resource
    Larval parasitoids and pathogens of the fall armyworm in honduran maize (1989)
    Springer
    BioControl 34 (1989), S. 331-340 
    Details
    ISSN: 1573-8248
    Keywords: Spodoptera frugiperda ; fall armyworm ; natural enemies ; parasitoid ; pathogens ; maize ; Spodoptera frugiperda ; gusano cogollero ; enemigos naturales ; parasitoide ; entomopathógenos ; maiz ; Spodoptera frugiperda ; ennemis naturels ; parasitoïdes ; pathogène ; maïs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Resumen El parasitismo por enemigos naturales del gusano cogollero,Spodoptera frugiperda en todos sus ínstares larvales, fué evaluado en cinco campos de maíz en Honduras, Centro America, durante la temporada de siembra de 1984. El complejo de enemigos naturales mató el 42% de las larvas de cogollero. El parasitoide braconido,Chelonus insularis, fué el enemigo natural más común, constituyendo el 36.8% del complejo y causando una mortalidad del 15.5% de las larvas. Otros enemigos naturales importantes fueron el nemátodoHexamermis sp., la mosca tachínidaLespesia sp., y el hongo imperfecto entomopatogénicoNomuraea rileyi. Rangos específicos de los ínstares larvales del cogollero fueron atacados por varias especies de enemigos naturales.Chelonus insularis fué un enemigo natural importante del cogollero en todas las densidades de larvas muestreadas.
    Abstract: Résumé Le parasitisme dû aux ennemis naturels de tous les stades larvaires de la NoctuelleSpodoptera frugiperda a été quantifié dans 5 champs de maïs au Honduras, en 1984, durant la saison. Au total, 42% des larves hôtes ont été tuées par le complexe des ennemis naturels. Le Braconide parasitoïdeChelonus insularis était l'ennemi naturel le plus commun; il représentait 36,8% du complexe, causant 15,5% de la mortalité des larves de la Noctuelle. Les autres ennemis naturels importants comprenaient le nématodeHexamermis sp., la tachinaireLespesia sp. et le champignon entomopathogèneNomuraea rileyi. Des échantillons variés de stades larvaires ont été attaqués par plusieurs espèces d'ennemis naturels.Chelonus insularis était un important ennemi naturel de la Noctuelle à toutes les densités larvaires observées.
    Notes: Abstract Parasitism by natural enemies of all larval instars of the fall armyworm (FAW),Spodoptera frugiperda, was quantified in 5 Honduran maize fields during the 1984 growing season. Overall, 42.0% of the host larvae were killed by the natural enemy complex. The braconid parasitoidChelonus insularis was the most common natural enemy accounting for 36.8% of the complex and causing 15.5% mortality of FAW larvae. Other important natural enemies included the nematodeHexamermis sp., the tachinidLespesia sp. and the imperfect entomopathogenic fungusNomuraea rileyi. Distinct ranges of larval instars were attacked by several natural enemy species.Chelonus insularis was an important FAW natural enemy at all larval densities observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02372472
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...