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 “"soil sciences"”.
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Extractable chromium, iron, and manganese from two Michigan soils as related to soil pH and applied chromium
… State University. Dept. of Crop and Soil Sciences,
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Physiological effects of diflubenzuron [-l(4-chlorphenyl)-3-(2,6-difluorobenzoyl)urea] and fentin hydroxide (triphenyltin hydroxide) on soybean [Glycine max (L.) Merr.] and rice (Oryza sativa L.)
… State University. Dept. of Crop and Soil Sciences,
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An agricultural use value, computer assisted, mass, farmland appraisal system
… State University. Dept. of Crop and Soil Sciences,
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The relationship of spike drying rate and grain color in barley
… State University. Dept. of Crop and Soil Sciences, 1970
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The genomes of Agropyron trachycaulum (Link) Malte and Hordeum jubatum L. and their hybridization with Hordeum vulgare L
… State University. Dept. of Crop and Soil Sciences, 1975
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The effect of methods and rates of application of two copper carriers on the yield and copper content of spinach and sudan grass grown in the greenhouse on two organic soils
… of Agriculture and Applied Science. Dept. of Soil Sciences, 1952
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The (unspoken) history of agriculture: underrepresented populations in agriculture education curriculum
… Food, and Natural Resources; Animal, Plant, and Soil Sciences; and Natural Resources and Environmental Systems curriculum created by a widely-used Agriculture Education curriculum company? (2) How are these underrepresented populations depicted in the Agriculture, Food, and Natural Resources; …
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Managing scientific change in agricultural policies: soil productivity, resource conservation and the legitimation of agrobiology
… conditions presiding over conceptual changes in soil sciences in Québec since 1960, and the legitimation of research in agrobiology. At the beginning of the seventies, researchers in soil sciences opted for a physico-chemical interpretation of soil fertility phenomena and for a scientific …
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Prickly Sida (Sida spinosa L.): Biology and In-Crop and Post-Harvest Management Programs
… Louisiana on silty clay loam and clay soils, prickly sida seedling emergence began in early March when soil temperature reached 13.8 C and ceased in mid-October. Seasonal peaks in emergence were associated with rainfall events and variability in prickly sida emergence was observed …
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Factors Affecting Within-plant Variation of Cotton Fiber Quality and Yield
Cotton is sold by weight, but a bale’s lint price per pound is determined by its fiber quality profile. Cotton quality is defined by a set of standardized properties (length, strength, elongation, uniformity, color, trash, and micronaire) collected on every United States bale. Each cotton fiber is …
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Grazing impacts on sediment production and runoff from single and mixed species grazing
… effect of animal activity by monitoring selected soil characteristics/properties; and to characterize the soil properties that could be affecting water erosion and P movement in runoff water. The main hypothesis was that the single species grazing system would generate higher environmental impact …
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Transport and adsorption-desorption of heavy metals in different soils
… the reactivity and mobility of heavy metals in soils is indispensable for assessing their potential risk to the environment. In this study, column transport and batch kinetic experiments were performed to assess the sorption-desorption and mobility of Cd, Cu, Pb, and Sn in alkaline and acidic …
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nEstablishing soil compaction thresholds for the M1A1 Abrams tank at Camp Minden, Louisiana
Soil compaction is a primary impediment to vegetation regeneration on military land used for M1A1 Abrams tank training. As such, there is a need to identify soil compaction thresholds and develop guidelines with which military range managers can determine appropriate timing and intensity of …
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Red rice competition and control in cultivated rice
Studies were conducted to evaluate rice competitiveness with red rice and how to utilize glufosinate- and imazethapyr-resistant rice in water-seeded rice to control red rice. In the interference study, CL 121, Cocodrie, Drew, and Jasmine were seeded to obtain 95, 190, and 290 plants/sq m. Red rice …
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Risk assessment of the transfer of imazethapyr herbicide resistance from Clearfield rice to red rice
Potential outcrossing between Clearfield rice and red rice will have a direct impact on the management and long-term usefulness of imazethapyr technology for rice weed control. The principal objective of this research was to determine the rate and agronomic consequences for outcrossing between …
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Developing Hybrid Cotton (Gossypium spp.) Using Honey Bees as Pollinators and Roundup Ready® Gene as Selection Trait
Cotton (Gossypium spp.), the most important textile fiber crop in the United States (US), is cultivated in 17 states across the southern US. and a very important agricultural commodity for several states. The use of hybrids in the US has been limited due to seed cost production. The objective of …
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Control of two perennial grasses in southern turfgrasses
Knotgrass (Paspalum distichum L.) and torpedograss (Panicum repens L.) are perennial grasses that are extremely difficult to remove in established turfgrass. Studies were conducted to determine the potential for controlling these troublesome perennial weeds. Pot studies were conducted for two years …
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Phenolic composition and antioxidant activity of sweetpotatoes [Ipomoea batatas (L.) Lam]
The influence of numerous factors on sweetpotato phenolic content and antioxidant activity was determined. Simplified, robust, and rapid methodologies were developed to quantify total phenolics and individual phenolic acids in sweetpotatoes. Quantification of total phenolic content using …
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Quantitative trait loci mapping for agronomic and fiber quality traits in Upland cotton (Gossypium hirsutum L.) using molecular markers
The breeding of Upland cotton (Gossypium hirsutum L.) cultivars that combine high yield and fiber quality is a major challenge to the breeder. The understanding of the quantitative trait loci (QTL) contributing to agronomic and fiber quality traits offers an excellent route to solve this problem. A …
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Sugarcane growth, sucrose content, and yield response to the ripeners glyphosate and trinexapac-ethyl
Under Louisiana climatic conditions, production of sugarcane (Saccharum spp.) is limited to a maximum growth period of nine months. To increase sucrose concentration in the crop, ripener is applied prior to harvest. The chemical ripeners, glyphosate and trinexapac-ethyl were applied to the …
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