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 80 for “"yield potential"”.
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Biomass yield potential and nitrogen use efficiency of the photoperiod-sensitive energy sorghum
Recently introduced high-yield energy sorghums (Sorghum bicolor L. Moench) have great potential to be dedicated lignocellulosic biofuel feedstocks. Nitrogen (N), the key nutrient for plant growth and development, is the primary input and cost for an energy sorghum production system. In order to …
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Maximizing corn yield potential through proper rate, placement, and timing of nitrogen fertility
… management factors has led to ever-greater corn yields. These crop management factors include: hybrid, planting population, nitrogen (N) fertility, additional nutrient fertility, and foliar protection; and used together can increase grain yield by more than 100 bushels/acre. Nitrogen has the …
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A sorghum NAC gene is associated with variation in vascular development, biomass properties, and yield potential
… crop breeding include maximizing sugar and grain yield while maintaining the rigidity and strength of the stalk. Vascular architecture influences not only stalk strength and rigidity, but also water, nutrient and sugar transport, which ultimately determine grain yield. The building blocks of the …
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Statistical methods and models for analyzing sugarcane (Saccharum species hybrids) plant breeding data
… inefficient. Data from advanced variety trials (yield, quality and agronomic traits) are collected over several crop-years to determine yield potential and ratooning ability of genotypes follow a multivariate repeated measures structure. In Louisiana, the sugarcane borer and recently the Mexican …
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Understanding variability associated with corn grain yield response to foliar fungicide application
… and reduce oxidative stress in plants. Yield response to fungicide application tends to be highly variable as a result of varying disease pressure, but may also be affected by environmental factors and management practices that influence corn yield potential. The focus of this research …
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Association Between SCN Resistance and Yield in Soybean, And, QTL Mapping of Field Resistance to Sclerotinia Sclerotiorum in Soybean
… of SCN resistant cultivars with higher yield potential and the development of soybean cultivars with increased levels of resistance to Sclerotinia stem rot.
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Remote Sensing for Precision Agriculture: Within -Field Spatial Variability Analysis and Mapping With Aerial Digital Multispectral Images
… field used in this study. Analysis of spatial yield with respect to spectral reflectance showed that the visible and NIR reflectance were negatively correlated to yield and crop population in heavily weed-infested areas. The yield potential was highly correlated to image indices, especially to …
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Assessment of Spectral Reflectance as Part of a Variable-Rate Nitrogen Management Strategy for Corn
… to account for spatial variability in grain yield potential at a sub-meter resolution. The objective of this study was to examine the relationships among spectral reflectance indices, corn tissue N content, chlorophyll measurements, plant size and spacing measurements, and grain yield to …
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Comparison of Variety Performance Trials and Farm Level Yield Gains of Wheat Varieties Adopted in Saskatchewan
… variety adoption, considering factors such as yield potential, weed, pest, and disease resistance, and climatic adaptability. These variety performance trials, however, are conducted under controlled conditions that may not adequately reflect real-world farming or heterogeneity in yield across …
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Nitrogen Management and Weed Suppression in Organic Transition
… the effect on N availability and broccoli yield potential of incorporating cover crops with conventional tillage (CT) or mulching cover crops with no-tillage (NT) practices. Broccoli was grown during the third year of organic transition in the spring and fall of 2006 at the Kentland …
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Predicting Corn Response to Variable Synthetic Fertilizer Treatments Using UAV-Derived Imagery
… and temporal variations. Accurate in-season yield potential estimation plays a vital role in guiding nutrient management decisions and supporting grain marketing strategies. This study evaluated the potential of Unmanned Aerial Vehicle (UAV) derived imagery to estimate chlorophyll (Chl) …
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Effect of irrigation on fertilizer nitrogen requirement, economic returns, and water availability in a corn-soybean rotation
… of irrigation to increased and/or stabilized yields. Delaying nitrogen (N) applications into the growing season supports more accurate N recommendations and reduces potential for N loss; but delayed applications can pose risks including lower yield. The objectives of this study were to: 1) …
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Analyzing variation in plant canopy conversion efficiency and assessing canopy and leaf photosynthetic efficiency in soybean with reduced chlorophyll content
… radiation into biomass (εc) is a component of yield potential. Unlike other efficiency components of yield potential, εc in C3 and C4 plant groups is estimated to be much lower than the theoretical maxima, signifying that εc limits yield potential but has room for improvement. This makes it the …
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Innovations in fertilizer use and agronomic management for greater productivity of corn and soybean
… L.) and soybean [Glycine max (L.) Merr.] grain yields will require a comprehensive understanding of the agronomic and nutritional factors that influence corn and soybean yields; therefore, it is critical to understand the interactions of these factors evaluated as a whole in order to efficiently …
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Effects of plastic mulch, row cover, and cultivar selection on growth of tomatoes (Lycopersicon esculerntum Mill.) in high tunnels
… were grown to: 1) evaluate their early season yield characteristics when grown using different mulch types with and without row cover; and 2) evaluate yield potential among different cultivars when grown in high tunnels. Row covers did not significantly increase total, or US number 1 yield of …
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Remote sensing, normalized difference vegetation index (NDVI), and crop yield forecasting
… (NDVI), to assess and quantify corn and soybean yield potential. Fixed-effect panel and ordinary least squares NDVI regression models were developed for different level of spatial aggregation. Through the regression analysis, the thesis identified the relationship between the accumulation of …
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Evaluation of Yield and Agronomic Performance of Leafed and Semi-leafless Pea Blends
… susceptible to lodging, but it may have high yield potential when lodging is prevented. In contrast, the semi-leafless pea is bred for lodging resistance and has greater yield stability. However, it has reduced leaf area which may be related to yield potential. When grown together, the …
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Nutrient uptake and partitioning in high-yielding corn
… nutrient accumulation patterns for corn yielding 12.0 Mg ha-1. The results of Chapter 1 suggest that nutrient requirements for production and the quantity of nutrient removal have increased markedly over the past 50 years. Resulting accumulation figures also showed that P, S, Zn, and Cu …
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Confirming QTL for seed yield from exotic soybean germplasm
… both genetic diversity and improved seed yield potential in the N.A. gene pool. Of the putative QTL for seed yield that have been identified, only a small percentage have been tested in confirmation trials and even fewer have been confirmed. The objective of this study is to confirm …
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Arthropod damage in corn across site-specific management zones and differing water and nitrogen levels
Site-specific insect management has the potential to make pest management more efficient, but has yet to be implemented. One method of implementing site-specific management would be to make decisions at the management zone level. Management zones are homogenous subregions within a field that can be …
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