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 25 for “"Relative Yield"”.
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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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Modification and Evaluation of a Water Balance Model to Simulate Corn Yields in Drained Waterways
… model was successfully modified to determine yield response to tile drainage in waterways based on climate data. Modifications to the model were completed based on field measurements. Infiltration and tile drainage routines in the model were modified to improve the model simulation of the …
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Analysis of intraspecific and interspecific interactions between the invasive exotic tree-of-heaven (Ailanthus altissima (Miller) Swingle) and the native black locust (Robinia pseudoacacia L.)
… (p <0.05). Competition indices such as Relative Yield Total and Relative Crowding Coefficient suggested that A. altissima was the better competitor in mixed plantings. Ailanthus altissima consistently produced a larger above ground and below ground relative yield while R. pseudoacacia …
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Evaluation of Cover Crops, Conservation Tillage, and Nitrogen Management in Cotton Production in Southeastern Virginia
… examined 1) soil compaction and cotton yield response to strip-tillage compared to no-tillage with a precision planted tillage radish and 2) the influence of legume mix, rye, and legume mix/rye combination cover crops with four in-season nitrogen (N) rates applied to cotton on cover crop …
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Automated Water Management for Center Pivot Irrigation Systems
… with pumping rates of 50.5 or 63.1 L/s.<br /> A yield model was used to determine if the minimum allowable water contents were set to a correct level for com and to determine the overall effectiveness of the irrigation scheduling software. The minimum allowable balances were formed to be set to …
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ΜΕΛΕΤΗ ΤΗΣ ΔΙΑΣΠΑΣΕΩΣ ΤΗΣ ΠΡΟΠΑΝΟΛΗΣ-2 ΣΕ ΑΠΛΟΥΣ ΚΑΙ ΜΕΙΚΤΟΥΣ ΚΑΤΑΛΥΤΕΣ ΕΠΙ ΦΟΡΕΟΣ SILICA
… PROBE REACTION AND THE FRACTIONAL CONVERSION AND RELATIVE YIELD WERE DETERMINED AT VARIOUS TEMPERATURES IN A FIXED BED REACTOR WORKING UNDER ATMOSPHERIC PRESSURE. (SHORTENED)
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Continuous No-till Management: Implications for Soil Quality, Carbon Sequestration, and Nitrogen Conservation
… The ISNT values were significantly related to yield without fertilizer N (r² = 0.57; p<0.001) and relative yield (r² = 0.64; p<0.0001). We also found that the ISNT extracted a relatively consistent percentage of total soil N (16.3 ± 0.73 %) suggesting it is a poor indicator of labile N. Total …
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Topsoil thickness impact on corn, soybean, and switchgrass productivity and soil nutrient management
… (Zea mays L.) and soybean (Glycine max [L.]) yield, profit, and nutrient dynamics on claypan soils. Understanding how and when DTC affects these factors across the landscape is crucial for improving management on these challenging soils. Site-specific placement of perennial crops, such as …
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Studies in photonuclear reactions
… of the energy spectra of emitted particles, the relative yield of different types of particle and the investigations of any 'structure' in the activation function should help to distinguish the more successful models. These measurements have not been made with sufficient accuracy to allow a …
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Studies in photonuclear reactions
… of the energy spectra of emitted particles, the relative yield of different types of particle and the investigations of any 'structure' in the activation function should help to distinguish the more successful models. These measurements have not been made with sufficient accuracy to allow a …
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Predicting Field Water Balance, Crop Yield, and the Economics of Drainage Under Various Cropping Systems Using Drainmod
… water management practice for increasing crop yield, research implicated tile drainage in surface and groundwater quality problems. Conservation practices such as crop rotation and controlled drainage may decrease tile flows and improve water quality. A two-year (2014-2015) subsurface drainage …
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A search for the reaction [mu]⁻ + Cu [arrow] e⁺ + Co
… However, there exists uncertainty in the relative yield and cutoff for high energy photons from radiative muon capture. Although we cannot be certain whether or not the reaction µ⁻ + Cu ⟶ e⁺ + Co has been detected, we can set an upper limit on the branching ratio relative to ordinary muon …
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Full-Season and Double-Crop Soybean Response to Potassium Fertilizer
… potassium (K) increases with increasing soybean yield. Little research has been conducted on soybean response to K on coastal plain and piedmont soils of Virginia, especially in double-crop systems. Nineteen full-season and 14 double-crop soybean experiments were conducted in 2013 and 2014 in …
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Assessing the salinity effects and economic feasibility of on-farm desalination technology in irrigated semi-arid regions
… is viable to improve soil health, crop yield, and long-term profitability. A subsurface salt transport model (MODFLOW-RT3D) is applied to a 50,600-ha (125,000 acres) region in southeastern Colorado located within the Arkansas River Valley. The model simulates the reactive transport in …
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AGRONOMIC AND PHYSIOLOGICAL CHARACTERS OF PEARL MILLET (PENNISETUM AMERICANUM L. K. SCHUM) GROWN UNDER A SPRINKLER IRRIGATION GRADIENT (DROUGHT, STRESS, INDEX).
… Growth was analyzed every other week, while yield and yield components were evaluated at the end of the experiment. Harvest Index, drought tolerance index, and water use efficiency (WUE) were calculated. Percent crude protein of seeds was analyzed, and photosynthesis was measured in 1984 …
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Agronomic and Economic Comparison of Full-Season and Double-Cropped Small Grain and Soybean Systems in the Mid-Atlantic USA
… of this research were to: i) determine soybean yield and compare cropping system profitability of the three cropping systems; ii) perform a breakeven sensitivity analysis of the three cropping systems; and iii) determine the effect of planting date and previous winter crop on soybean yield and …
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Exploring variation in water use efficiency in barley (Hordeum vulgare L.) among wild and circadian mutant varieties, and its impact on responses to drought
… farmland is not likely to increase, therefore yields must rise. Episodes of drought arising from an increasingly-unstable climate will also become more frequent, severe and persistent. As a result, water use in agricultural production must be managed both where water availability appears …
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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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Evaluation of water use efficiency in upland Rice (Oryza sativa L) Under deficit irrigation)
… aboveground biomass, 1000 grain weight, grain yield, and harvest index (HI). Other parameters included crop consumptive water use (ETc), crop coefficient (Kc), crop response factor (Ky) and water use efficiency (WUE). Irrigation interval significantly affected (p<0.001) plant height, panicle …
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Evaluation of water use efficiency in upland Rice (Oryza sativa L) Under deficit irrigation)
… aboveground biomass, 1000 grain weight, grain yield, and harvest index (HI). Other parameters included crop consumptive water use (ETc), crop coefficient (Kc), crop response factor (Ky) and water use efficiency (WUE). Irrigation interval significantly affected (p<0.001) plant height, panicle …
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