Life Sciences Commons^™

The Capability Of The Utah State University Drainage Farm As An Irrigation And Drainage Demonstration Project, Mario Perez

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

There are in Cache County 20,000 acres of poorly drained land similar in many respects to the other wet lands of Utah, estimated to total a half million acres, which are mostly natural meadows. In order to turn those lands more productive either for forage or other crops, adequate management practices must be developed regarding control of the surface water, leaching, reduction of artesian pressure, and improved water application techniques.

Studies carried out at the Utah State University Drainage Farm, west of Logan, Utah, which is representative of those poorly drained lands, have already shown successful ways for these areas …

Nutritive Values Of Russian Wildrye, Crested Wheatgrass, And Intermediate Wheatgrass Grazed By Cattle On Utah Foothill Ranges, George W. Mitchell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A comparative index to digestible nutrients was established for Russian wildrye, crested wheatgrass, and intermediate wheatgrass seeded on foothill areas of Utah. The nutritive values of these grasses were compared by the lignin ratio method, the chlorophyllan ratio method, and the in vivo rumen bag process.

Average digestion coefficients computed by the lignin ratio method for dry matter, ether extract, cellulose, and gross energy were highest for intermediate wheatgrass. Protein was more digestible for Russian wildrye. Digestible energy was adequate in all species to meet requirements for late lactation.

Results from the chlorophyllan ratio method were excessively high and were …

The Anatomical And Morphological Effects Of Dcpa On Seedlings Of Selected Species Of Plants, Bijan Shaybany

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Seeds of oat, green foxtail, squash and tomato were germinated in soil treated with different levels of DCPA (dimethyl 2, 3, 5, 6-tetrachlorote-rephthalate). The concentrations used varied according to the sensitivity of the plants to the chemical.

The response of oat and foxtail to DCPA was similar. The growth of booth root and shoot was reduced. This reduction was directly related to the concentration of DCPA. Anatomical studies showed that cells in the shoot and root meristems of treated plants were completely disarranged and that some of the cells of these regions were hypertrophied. Some clumping of nuclei was observed …

An Inheritance Study Of Sedimentation Values In Three Winter Wheat Crosses, Douglas J. Baker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three crosses were used to study the inheritance of the sedimentation properties in hard red winter wheat. The parents of the three crosses were the variety Delmar, and the breeding lines 217-61-7-14 and 217-19-5. Delmar has high sedimentation properties, 217-61-7-14 is intermediate, and 217-19-5 has very poor sedimentation qualities.

Sedimentation tests were run on five replications of the parents and 300 samples of the F₃ populations in each cross. A semi-micro sedimentation test (a one-fourth scale test) was run on 200 F₂ plants and the F₁'s from each cross. The distributions from each cross were analyzed …

A Histopathological Study Of Rhizoctonia Solani Kuhn Infection Of Resistant And Susceptible Lines Of Lima Bean (Phaseolus Limensis Macf.), Chulevan Bunnag

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of Rhizoctonia solani on the hypocotyls of resistant and susceptible lines of lima bean were studied. The fungus attacks lima bean at one or more stages during host development and causes pre-and -postemergence damping-off, root rot, and foliage blight. The isolate of the fungus used in this study was obtained from infected radishes grown in Salt Lake County, Utah.

The formation of infection cushions and modes of penetration by this fungus was no different on the resistant and susceptible lima bean hypocotyls. The infection process was studied under laboratory conditions. Differential staining showed that the fungal hyphae were …

Quantitative Evaluation Of Saponin Content In Du Puits Alfalfa Foliage (Medicago Sativa L.) With Trichoderma, Wang Li-Chun

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Selections in Du Puits alfalfa (Medicago sativa L. ) were evaluated for saponin content. The data obtained from the Trichoderma bioassay were converted to saponin values by regressions and standard curves. It was necessary to adjust the concentration of alfalfa extract in the bioassay so that the saponin content in alfalfa was estimated in that portion of the curve showing a marked response to saponin. A different regression was established for each group of low and high saponin plants of Du Puits alfalfa. The standard curve prepared with extract of Du Puits alfalfa used on the basis of its …

Some Parent-Progeny Relationships In Agropyron Elongatum, Max W. Turley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Twenty selected Agropyron elongatum clones were evaluated in parent and progeny nurseries with each clone represented by 560 progenies. Agronomic characters evaluated on the progenies included degree of erectness, three height measurements, and green weight data. Correlations were calculated between the seed yields of the progenies and the forage yield of the parents. General combining ability was determined for the 20 clones.

The clonal source of variation for erectness was high. More variation existed within clones for green weight than for any other character studied. Two specific clones exhibited better over-all general combining ability than the others. Successive seed yields …

The Effect Of High Air Temperature And Depth Of Planting On The Emergence And Development Of Selected Grain Sorghum (Sorghum Vulgare) Cultivars, Jhander Orihuela

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The behavior of seedlings of six sorghum cultivars planted at 2.5, 5.0, 7.5, and 10.0 centimeters was studied in growth chambers at air temperatures of 28, 32, 36, and 40 centigrades (daytime).

A day length of 12 hours and a nighttime air temperature 8 centigrades lower than daytime were used throughout.

The cultivars, three hybrids and three varieties, were grown in sand culture. Field moisture capacity was maintained during the period of observation.

After 14 days of growth, data were collected on the emergence percentages, above ground growth, above ground oven dry weights, below ground growth, and below ground oven …

A Study Of Foliar Absorption Of Urea In Peach And Apple Trees Influenced By Plant And Environmental Factors, Ataollah Yazdaniha

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Studies were conducted under greenhouse conditions to investigate the relative efficiency of urea absorption by 1-month-old peach and apple leaves. A 4 percent solution of urea containing .1 percent Colloidal X-77 was applied to the leaves in the form of a fine spray. To aid in this procedure, an improved micros prayer with a l milliliter capacity was developed. Accuracy of the sprayer was ± l percent.

Under greenhouse conditions, the upper and lower surface of peach and apple leaves absorbed urea. More urea was absorbed through the lower than the upper surface. Peach lower surface absorbed nearly as much …

Effect Of Foliar Application Of Urea And Ammonium Nitrate On The Dry Weight And Protein Content Of Maize Plants, Alvaro Fiallos

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Urea and ammonium nitrate were applied to leaves of maize plants growing in growth chambers on nutrient solutions containing three different concentrations of ammonium nitrate. Dry weights, and the soluble protein contents of leaves, sterns and roots we remeasured.

Both urea and ammonium nitrate did increase the dry weights of leaves and stems when ammonium nitrate was used in the nutrient solutions (0.5 and 2.5 mM/ liter). When nitrogen was not used in the nutrient solutions, no increments of dry weight occurred. The protein contents of leaves were increased for plants in the same nutrient solutions that produced increases in …

Overwintering Of Erwinia Amylovora Inside Living Host Tissue In Cache Valley, Utah, G. Doyle Morrill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Experiments were conducted to see if Erwinia amylovora (Burrill) Winslow et al. overwinters inside living host tissue in Utah. Bacteria, collected from apple, pear, mountain ash, chokecherry and Pyracantha, were used in the experiment. Isolates taken from buds and inner bark plated on nutrient yeast dextrose agar, we re tested by serological and bacteriophage techniques. Those showing positive tests were then inoculated into Bartlett pear seedlings to test virulence.

Both virulent and avirulent isolates were isolated from each species of plant in the experiment. Pathogenic bacteria were isolated from diseased tissue near cankers, as well as from apparently healthy inner …

The Effects Of Some Silvicultural And Soil Treatments On Aspen (Populus Tremuloides Michx.) Reproduction In Northern Utah, Calvin O. Baker

Aspen Bibliography

No abstract provided.

The Effect Of Cattle, Sheep, And Other Factors On Aspen (Populus Tremuloides) Reproduction After Clear-Cut Logging In Southern Utah, Paul A. Lucas

Aspen Bibliography

No abstract provided.

Populus: A Bibliography Of World Literature, 1854-1963, R.E. Farmer Jr., J.S. Mcknight

Aspen Bibliography

No abstract provided.