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A Preliminary Annotated Checklist Of The Foliose And Fruticose Lichens Of The Great Smoky Mountains National Park, Barbara Jo Moore

Masters Theses

While much of the flora of the Great Smoky Mountains National Park has been extensively studied, the lichens have been somewhat neglected. Degelius' Lichen Flora of the Great Smoky Mountains (1941) is the first, and until now the only extensive study of the lichens of this area. Sharp (1930) mentions Gyrophora dillenii (=Umbilicaria mammulata) from Mt. LeConte. Cain (1935), Mozingo (1954), Sierk (1958), and Hale (1961) mention several species from the Smokies. Mozingo (1961) gives keys to the genus Cladonia both in Eastern Tennessee and in the Great Smoky Mountains.

The descriptions and keys in this study have been compiled …

A Study Of Puccinia Graminis And Cronartium Ribicola, Duane W. Hughes

Graduate Student Research Papers

It was the purpose of this study (1) to review the literary history of rusts in the United States and in the Northwest in particular, ( 2) to learn where rusts generally are found geographically, (3) to gain further information regarding the etiology of wheat rust (Puccinia graminis tritici), of white pine blister rust (Cronartium ribicola) and to become enlightened on other rusts, (4) to learn ways of controlling the two rusts, black stem rust of wheat and white pine blister rust, and to gain an appreciation of the economic importance of rust prevention.

Cytological Evidence For Reciprocal Introgression In Agropyron Trachycaulum And Agropyron Spicatum, Laval M. Pitts

Theses and Dissertations

Agropyron trachycaulum (Link) Malte and Agropyron spicatum Pursh, both native range grasses of the Great Basin, often hybridize in nature. A. trachycaulum, is a tetraploid with 28 chromosomes. It has awnless or awntipped lemmas and small anthers. A. spicatum is a diplois with 14 chromosomes. It is characterized by having long awn that bend at maturity, and anthers which are about four times longer than A. trachycaulum. Artificial hybrids are intermediate between parents in awn and anther lengths and have 21 chromosomes. A natural population in Utah was found consisting of A. trachycaulum, A. spicatum, plants resembling the artificial hybrids, …

Concentrations Of Gamma-Emitting Fallout Radionuclides From Picea Rubens And Rhododendron Maximum Of The Great Smoky Mountains, William Kenneth Rudolph

Masters Theses

The testing of nuclear bombs and the subsequent release of radioactive fallout over the past 18 years has brought many problems related to the distribution of radioactive fallout and the affect of fallout on man and on his environment. The detonation of a nuclear devise produces some 170 radioactive isotopes. From these 170 isotopes there are seven gamma-ray-emitting fission products that have a half-life of such significant length that they are important in world-wide radioactive fallout problems (Table I, adapted from Mortensen, 1961).

It was the purpose of this study to measure the amount of fission produced gamma-emitting radionuclides in …

The Effect Of Urea, Ammonium Sulfate, And Organic Materials On Nitrite Accumulation And Gaseous Loss Of Nitrogen In Acid Soil, Siddangouda V. Patil

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nitrogen is one of the major elements essential for plant growth. It is the element most prone to depletion by cultivation and is usually found deficient in soils. In successful farming the problem of nitrogen supply is of special importance because plants need it in large amounts, it is fairly expensive to supply, and it is easily lost from the soil.

A Nutritional Survey Of Sweet Cherry Orchards In Utah, M. Dale Christensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The sweet cherry crop has always been the number one fruit crop in Utah until the last three or four years when it shifted to second place due to severe spring frosts. However, the outlook for its continued success is still very good. Even though there are drawbacks such as virus infestations, spring frosts, nutritional disorders, cracking, doubling, and bird injury, new plantings are being made each year in each of the important fruit producing counties. Utah is also important in the national production of sweet cherries and is presently sixth in the nation.

A nutritional survey of sweet cheries …

Vegetational Changes Of The Uinta Basin Since Settlement, Bernard Curtis Dastrup

Theses and Dissertations

A general survey of the vegetational changes of the rangelands of the Uinta Basin was made using historical records, documents, interviews, and recent vegetational surveys. Historical vegetatienal information about the Uinta Basin is very limited, most of it pertaining to the vegetation along the streams and rivers. Escalante, in 1776, mentioned the splendid groves of cottonwoods, the fine pastures, and the abundance of game along the rivers. Ashley in 1825 and Powell in 1870 entered the Basin via the Green River. Ashley crossed the Basin following the Duchesne River and its tributary the Strawberry River. He described the groves of …