Browsing by Subject "Range Science"
Now showing items 1-20 of 30
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(Texas A&M University. Libraries, 1978)Simulation of changes in production within an Andropoqon-Paspalum dominated grassland ecosystem of east-central Texas was based on 36 months of environmental and 20 months of biomass data. Simulation models utilizing ...
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(Texas A&M University. Libraries, 1977)The objectives of this study were to a) describe the present herbaceous cover at the Biological Experiment Section (BES), b) study association of vegetation and soil, c) identify tentative range sites, and d) evaluate ...
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(Texas A&M University. Libraries, 1975)Techniques of dry ashing plant material and column extracting soil material were developed to convert ⁴⁵Ca to a chloride salt. Calcium-45 recovery efficiency was approximately 90% for plant material and 95% for soil. ...
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(Texas A&M University. Libraries, 1977)A taxonomic study was made of two genera, Dichanthelium and Panicum, in order to justify the elevation of Dichanthelium to generic rank. A comparison of all published characters, all new character differences found by the ...
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(Texas A&M University. Libraries, 1981)A biosystematic treatment was made of the Digitaria sanguinalis complex in North America. Materials for morphological, anatomical, embryological, and cytological studies were collected from throughout this geographic area. ...
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(Texas A&M University. Libraries, 1978)Numerous taxa of genera Leptochloa, Diplachne, Bewsia, Cypholepsis, Gouinia, Kengia, Pogonarthria, Psilolemma, Trichoneura, and Tripogon were studied (1) to determine the systematic relationships of Leptochloa, (2) to ...
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(Texas A&M University. Libraries, 1975)A taxonomic investigation of the Schizachyrium cirratum - Schizachyrium sanguineum complex was made. The following taxa were included: S. cirratum, S. hirtiflorum, S. sanguineum, and S. semiberbe. The above taxa were ...
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(Texas A&M University. Libraries, 1970)The yearly diets selected by Angora goats were compared on heavily and lightly grazed ranges in the Edwards Plateau region of Texas. Comparisons were based on the botanical and nutritive composition of dietary samples ...
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(Texas A&M University. Libraries, 1983)Reciprocal influences of plants and animals were investigated in a study conducted in 1979 and 1980 by varying the ratio of cattle, sheep, and goats in five pasture grazing populations. Diet selection, voluntary forage ...
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(Texas A&M University. Libraries, 1982)Texas wintergrass (Stipa leucotricha Trin. & Rupr.) is an erect, tufted, cool-season, perennial which is an important component in plant communities of central and northcentral Texas. Experiments were conducted in the ...
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(Texas A&M University. Libraries, 1977)Three species of perennial range weeds, common goldenweed (Isocoma coronopifolia (Gray) Greene), Drummond's goldenweed (Isocoma Drummondii (T.&G.) Greene), and spiny aster (Aster spinosus Benth.) were studied relative to ...
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(Texas A&M University. Libraries, 1983)Lotebush, a spinescent, highly-branched shrub, is codominant with honey mesquite on almost 4.8 million ha of rangeland in the Rolling Plains of Texas. Three facets of lotebush ecology were investigated during 1979 and 1980 ...
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(Texas A&M University. Libraries, 1978)A series of trials was conducted in April, July, and September, 1977 to examine the effect of level of stocking pressure on organic matter intake and on the botanical and chemical composition of cattle diets. Levels of ...
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(Texas A&M University. Libraries, 1983)The first of two experiments was initiated in August 1975 to investigate methods to improve the management of goats on rangelands. Experiment I compared the botanical and nutritive composition of diets collected from ...
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(Texas A&M University. Libraries, )Change in culm density and end of season above- and below-ground biomass were monitored within a native seedling stand of Spartina alterniflora. Annual trends in culm density, culm height, and above- and below-ground biomass ...
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(Texas A&M University. Libraries, 1977)This study was conducted on the Sonora Research Station near Sonora, Texas, in the southwestern portion of the Edwards Plateau. The objective of the study was to determine the effects of two long-term grazing systems on ...
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(Texas A&M University. Libraries, 1984)This investigation was conducted at two experimental sites on the National Range Research Station, Kiboko, to evaluate forage yield, leaf-to-stem ratio, crown area, tiller number, regrowth height, forage digestibility, and ...
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(Texas A&M University. Libraries, )This study was conducted on the Texas Experimental Ranch, located in the Rolling Plains near Throckmorton, Texas. Study objectives were to: (1) determine the influence of deferred-rotation, short duration, and continuous ...
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(Texas A&M University. Libraries, 1978)A study initiated in 1973 explored relationships between honey mesquite (Prosopis glandulosa Torr. var. qlandulosa) and understory vegetation on a deep hardland range site in northcentral Texas. Forage production and ...
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(Texas A&M University. Libraries, 1984)A short-duration grazing system was simulated to evaluate dietary quality and forage intake of steers grazing at four stocking rates. Above normal precipitation in 1981 created non-restrictive herbage allowances at all ...