Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"light interception"”.
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Light interception by grain sorghum
Call number: LD2668 .T4 1969 W547
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Light interception by grain sorghum
Call number: LD2668 .T4 1969 W547
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Leaf area index, light penetration, and carbohydrate reserves during growth of Kentucky 31 tall fescue (Festuca arundinacea Schreb.)
… dry matter production, leaf area index (LAI), light penetration through the canopy and carbohydrate reserve fluctuations during regrowth under different growth stages and cutting managements of Kentucky 31 tall fescue were studied in three field experiments during spring and summer. Stages of …
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Plant Architecture, Photosynthetic Responses, and Population Biology in the Palms Socratea Durissima and Scheelea Zonensis on Barro Colorado Island, Panama (Physiological, Tropical)
… change as plants mature, and can affect light interception and carbon budgets. Thus plant growth forms are expected to affect the light requirements of plants, and are therefore expected to influence demographic patterns.
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Evaluation of Yield and Agronomic Performance of Leafed and Semi-leafless Pea Blends
… monoculture; however, the blend did not affect light interception, disease, lodging, and yield relative to the semi-leafless monoculture. The estimated optimal blending ratio, 86:14% SL/L, had a 13% yield increase compared to the leafed monoculture, but no yield and agronomic advantage compared …
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Regrowth analysis of alfalfa (Medicago sativa, L.) during three seasons in 1966
… summer; the same trend was observed in N.A.R. Interception of 95% of the light required different L.A.I. values during the three seasons, and these values were reached at different dates of regrowth and stages of maturity. Maximum growth rates were not associated with 95% light interception. …
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The effect of field pea (Pisum sativum L.) basal branching on optimal plant density and crop competitiveness
… with weeds. Plant emergence, number of branches, light interception, harvest index and grain yield were measured. Growth, seasonal temperature and rainfall were near normal in 2005. Severe terminal drought occurred in 2006 which may have lead to decreased yields. Branching was greatest at low …
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Evaluation of Nitrogen Management Schemes upon Vine Performance in Cover Cropped Vineyards
… negatively impacted canopy density, fruit zone light interception, or botrytis bunch rot incidence. The combination of both a soil-applied and foliar-applied N fertilizer may be the most effective means to increase both vine capacity and YAN in vineyards where vineyard floor cover crops are …
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Miscanthus X Giganteus Production: Meta-Analysis, Field Study and Mathematical Modeling
… (a winter legume). Variables analyzed included light interception, greenness and dry biomass. In Chapter 3 a mechanistic model, WIMOVAC, was descried and parameterized for simulating M. x giganteus production. The model showed great potential at predicting photosynthesis, leaf area index and dry …
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Evaluation of Nitrogen Management Schemes in Cover Cropped Vineyards
… negatively impacted canopy density, fruit zone light interception, or botrytis bunch rot incidence. The combination of both a soil-applied and foliar-applied N fertilizer may be the most effective means to increase both vine capacity and YAN in vineyards where vineyard floor cover crops are …
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Quantifying genotypic and environmental factors affecting potato canopy growth
… plateau. There is a strong correlation between light intercepted, total biomass produced and biomass partitioned to the tubers as yield. Variation in potato canopy growth can be analysed using non-destructive measurements and the size of the canopy determines radiation interception. Proportion …
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Enhancing photosynthetic capacity and energy conversion in wheat
… inputs of fertilizer or water. The canopy light-driven carbon uptake through photosynthesis is the primary determinant of plant biomass and yield. In this context, it is crucial to understand crop physiology and plant behaviour, with a focus on carbon balance, in contrasting environments, …
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Elucidating the ecophysiological complexities of maize and soybean intercrop systems to improve ecosystem services
… objectives of this research were to: 1) quantify light interception, photosynthetic capacity, and seasonal evapotranspiration (ET) under rainfed conditions for an additive alternate-row maize and soybean intercropping system to assess the potential for polyculture systems to improve water-use …
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The timing of growing season drought and its effects on above- and belowground production in a mesic grassland
… soil moisture, soil N and P content, canopy light interception and plant community composition in addition to ANPP and BNPP. I expected that ANPP would be more sensitive to drought than BNPP based on evidence from past studies that have almost always found a positive correlation between …
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Computational Canopy Models For Precision Measurement And Adaptive Management Of Grapevine Performance
… of these methods in the control of a specific sunlight-sensitive compound vital to the organoleptic qualities of Riesling wine. The development and application of new computational methods for managing both the data volume of high-resolution models and the combinatorial complexities of …
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Canopy Architecture and Plant Density Effect in Short-Season Chickpea (Cicer arietinum L.)
… measurements and calculated variables included light interception, biomass, growth rate, seed yield, harvest index, ascochyta blight severity and radiation- and water use efficiencies. The plant density which produced the highest seed yield when averaged over years for each location for each …
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Competition For Above And Below Ground Resources Among Annual Species From The Plant To The Field: Quantification Analysis And Modeling
… based model was developed, which estimates light interception, photosynthesis, respiration, growth, photosynthate allocation and root growth at the leaf or plant level, allowing plants to compete for solar radiation and soil resources. Each of the model components had been calibrated and …
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Farming in the city: how the urban environment affects vegetable crop production, soil heavy metal contamination and nutrient dynamics, produce nutritive quality, and insect dynamics in urban gardens
… and logged temperature, humidity, wind speed, light irradiation, CO2 concentration, and ozone concentration. Ozone levels were higher at peri-urban sites. Temperature, CO2, and vapor pressure deficit were higher in urban sites and lowest in the rural site. Yield of spring and fall crops were …
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Morfogênese e características estruturais da Brachiaria humidícola submetida a combinações de alturas de resíduos pós-pastejo e frequências de desfolhação
O trabalho foi conduzido com o objetivo de avaliar a influência de práticas de manejo baseadas em combinações de frequências de desfolhação e alturas de resíduos pós-pastejo sobre a dinâmica do fluxo de biomassa da planta em pastos de Brachiaria humidicola cv. Comum, em sistema de pastejo com …
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Physiological mechanisms of yield improvement in historical U.S. soybean germplasm
… by which soybean canopies intercepted light (ε_i), converted light energy into biomass (ε_c), and partitioned biomass into seed (ε_p) were examined. Seed yield increased on average by 26.5 kg ha-1 yr-1, and the increase in seed yield was driven by improvements in all three efficiencies. …
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