Browsing by Subject "Major soil science"
Now showing items 1-20 of 41
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(Texas A&M University. Libraries, 1992)The soils and sediments of Cobweb Swamp were investigated to adumbrate landscape evolution and the impact of the Maya on a palustrine wetland. Cobweb Swamp is adjacent to the archaeological site of Colha in northern Belize. ...
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(Texas A&M University, 1997)Agroforestry systems have been regarded as an effective alternative for land uses in the humid tropics because they present beneficial effects upon soil characteristics. The objectives of this study were to detail agroforestry ...
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(Texas A&M University. Libraries, 1994)Lack of organic input is a major factor contributing to the deterioration o f the sandy Alfisols and Entisols in the Sahelian zone of West Africa. Cowpea [Vigna unguiculata (L.) Walp.] has great potential as green manure ...
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(Texas A&M University. Libraries, 1985)
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(Texas A&M University. Libraries, 1978)A three year forage crop study was initiated in 1975 at the Big Brown mine in Freestone County, Texas, to determine the yield and reclamation potentials of various grasses and legumes on a lignite mined soil. Grasses used ...
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(Texas A&M University. Libraries, 1981)Seven soil kaolinites and four geologic kaolinites were studied to determine the extent, valence, and coordination number of iron in the kaolinite structure. Three synthetic kaolinites of varying iron content, as well as ...
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(Texas A&M University. Libraries, 1988)The objectives of this investigation were to study the mineralogy, surface composition and reactivity of Si-containing ferrihydrites, and to evaluate these materials as Fe amendments for calcareous soils. Ferrihydrite with ...
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(Texas A&M University. Libraries, 1993)Strains of clover rhizobia [Rhizobium leguminosarum biovar trifolii] used to inoculate seeds of arrowleaf clover [Trifolium vesiculum Savi] often fail to survive in the field. The contribution of plasmids to the saprophytic ...
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(Texas A&M University. Libraries, 1977)Incubation experiments were conducted for 40 days at 28+-1*C to determine the effect of Hg and As in leaf, stem, and root tissues of common bermudagrass added to a Norwood silt loam and a Houston Black clay on microbial ...
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(Texas A&M University. Libraries, 1993)The major hydrocarbon constituents that often contaminate groundwater resources from oil and petroleum product spills are benzene, toluene, ethylbenzene, and xylenes (BTEX). Benzene is the most toxic and most mobile ...
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(Texas A&M University. Libraries, 1995)This project was designed to explore the potential of white-rot fungi to detoxify TNT contamination in liquids, and to define the optimum conditions for TNT detoxification. All the selected fungal strains, Phanerochaete ...
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(Texas A&M University. Libraries, 1980)The most generally limiting nutrient to growth of forage grasses is fixed nitrogen in the form of No3- or NH4+. Dinitrogen fixation by bacteria associated with forage grass roots in a system which would provide plants with ...
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(Texas A&M University. Libraries, 1985)Three adjacent ventilated mini-greenhouses (MGH) made of clear polyethylene film, transmitting natural solar radiation, were enclosed in a conventional inflated polyethylene greenhouse. In each MGH, an equal number of ...
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(Texas A&M University. Libraries, 1987)Nitrogen-fixing bacteria in the rhizosphere of cereal grasses may reduce the fertilizer nitrogen requirements of grass crops by providing them with fixed nitrogen. This study evaluated the effects of oxygen partial pressure, ...
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(Texas A&M University. Libraries, 1989)The variability of selected upland soils in Brazos County, Texas was studied using a sampling design that consisted of a main grid with 121 points spaced 30 m apart, three subgrids within the main grid, each with 49 points ...
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(Texas A&M University. Libraries, 1986)Soils associated with soft Cretaceous limestones occupy more than 3 million hectares in Central Texas and are important to the state's agricultural rangelands. Most of these soils occupy moderately to strongly sloping ...
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(Texas A&M University. Libraries, 1985)An understanding of the spatial variability of mine spoil is needed to improve sampling techniques. Core samples were taken at two sites at intervals of 3.05 m along four intersecting transects located at 0, 45, 90, and ...
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(Texas A&M University. Libraries, 1985)Claypan soils at four sites were studied to assess moisture relations, soil-forming processes, classification, and soil interpretations. Hydrological conditions, redox potentials and soil solutions were monitored during a ...
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(Texas A&M University. Libraries, 1985)Two crops of Fe efficient (RTx2536) and inefficient (BTx378) sorghum were grown in a greenhouse study both with and without added CaCO3 in sand which was crushed and separated by sedimentation techniques to obtain particle ...
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(Texas A&M University. Libraries, 1993)In the Sahel region o f Africa, grain sorghum (.Sorghum bicolor (L.) Moench) is a major human food source. Due to scarce water resources and soil infertility efficient crop water use is a key challenge for sustainable crop ...