Browsing by Subject "Soils"
Now showing items 1-20 of 39
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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. Libraries, 1981)Two mining areas of different ages, one area mined in 1972 and the other in 1977, were sampled in June and July of 1978. Twenty-five 100 cm cores were taken from each area and subdivided into 10 cm segments. Material from ...
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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, )The city of San Angelo, Texas, has used agricultural land for disposal of municipal wastewater since 1958. The city's sewage treatment plant provides only primary treatment to the wastewater before it is applied to a 259 ...
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(Texas A&M University. Libraries, 1976)A greenhouse experiment was conducted to determine the effect of 2-chloro-6-(trichloromethyl) pyridine, nitrapyrin, on nitrification in a Norwood silty clay loam under two moisture regimes. Calcium nitrate and ammonium ...
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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, 1983)Norflurazon {4-chloro-5-(methylamino)-2-((alpha),(alpha),(alpha)-trifluoro-m-tolyl)-3(2H)-pyridazinone} decreased the total chlorophyll content and the chlorophyll a/b ratio of nine plant species. Grain sorghum {Sorghum ...
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(Texas A&M University. Libraries, 1978)Major woody plant communities of the western Llanos of Guarico, Venezuela, were studied in 1975-77 to determine community structure, soil types, relationships of plant distribution to topographic, drainage and edaphic ...
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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, 1983)The Edwards Plateau covers 10 million ha in Central and West Texas (nearly 14% of the state) and is an important agricultural rangeland. A strong climo-gradient extends across the area with annual precipitation decreasing ...
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(Texas A&M University. Libraries, 1989)Periplatform sediments from the slopes north of little Bahama Bank and Exuma Sound were studied extensively for use as a model for sediments in other similar environments within the upper 50 to 150 meters below the seafloor ...
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(Texas A&M University. Libraries, 1980)Of all the problems that confront agriculture perhaps the unpredictability of weather is the most difficult to quantify. Twenty years of climatalogical data were obtained for Beeville, Texas and cumulative frequency ...
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(Texas A&M University. Libraries, 1977)Experimental and numerical simulation studies of solute transport processes in porous media were conducted to gain increased understanding of the phenomena that occur as solutes and water move through porous media. A ...
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(Texas A&M University. Libraries, 1979)A detailed survey of two tracts of houses on sloping terrain underlain by expansible clay-rich soils indicates that expansive soils are especially susceptible to downhill creep. This poses an additional threat on top of ...
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(Texas A&M University. Libraries, 1982)The major soils comprising the Gezira scheme are Hosh, Suleimi and Laota. These soils are dark grayish brown to dark brown, calcareous clays with < 1% organic matter.<p> The mineralogical data show that the soils of the ...
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(Texas A&M University. Libraries, 1982)Fifty five surface soils were evaluated for yield response to Mo fertilization. Dry matter yields of the + Mo and no Mo treatments were significantly different on approximately 33% of the soils. Only three soils produced ...
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(Texas A&M University. Libraries, 1983)The objective of this research was to examine the potential mobility of selenite (SeO(,3)('-2)) and selenate (SeO(,4)('-2)) in a composite of east Texas overburden materials. Portions of deep (20-60 m) cores from along the ...
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(Texas A&M University. Libraries, 1977)Most of the soils in the eastern one-third of Texas are acid. To this date little work has been done to evaluate the acid status of these soils. The present effort was initiated to study total acidity and the contribution ...
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(Texas A&M University. Libraries, 1980)Dredged sediments from the Gulf Intracoastal Waterway near Galveston, Texas were used as a substrate in the construction of an artificial marsh. Substrate chemical and physical properties (total Kjeldahl nitrogen, ammonium, ...