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Full-Text Articles in Life Sciences

Hydrologic Effects Of Contour Trenching On Some Aspects Of Streamflow From A Pair Of Watersheds In Utah, Robert Dean Doty May 1970

Hydrologic Effects Of Contour Trenching On Some Aspects Of Streamflow From A Pair Of Watersheds In Utah, Robert Dean Doty

All Graduate Theses and Dissertations

Streamflow from two drainages of the Davis County Experimental Watershed, Utah, was evaluated with respect to changes in distribution and volume following trenching of one of the drainages in 1964. Fifteen percent of the Halfway Creek drainage was trenched according to established U.S. Forest Service methods. Twelve years of records before trenching and four years of records after trenching were analyzed.

Analysis of the annual streamflow, the low streamflow period, and the spring streamflow period indicated no significant change in either volume or distribution of streamflow as a result of trenching. This conclusion was further substantiated by supplemental data ...


An Analysis Of The Competitive Position Of Cattle Finishing In Utah And Selected Western States, 1969, Stephen L. Olsen May 1970

An Analysis Of The Competitive Position Of Cattle Finishing In Utah And Selected Western States, 1969, Stephen L. Olsen

All Graduate Theses and Dissertations

Utah's cattle feeding industry was described by using both secondary and primary data. The primary data were collected through use of a personal interview survey.

Primary data were also collected in Idaho, while secondary data were used for Arizona, California and Colorado.

Intrastate analysis of feeding costs showed definite cost savings were achieved in all states through economies of size.

Interstate analysis of feeding costs showed Utah's larger capacity feedlots to be very competitive with larger capacity lots in other states.

1968 prices for both slaughter and feeder cattle were computed for each state. Prices in Utah were ...


An Application Of Statistical Decision Theory To Farm Management In Sevier County, Utah, Suwaphot Lakawathana May 1970

An Application Of Statistical Decision Theory To Farm Management In Sevier County, Utah, Suwaphot Lakawathana

All Graduate Theses and Dissertations

The major purpose of this study is to present selected empirical results of a study employing decision-making theory as a framework for considering decision making under risk. The part icular problem involves choices between alternative crop rotations for Sevier County farmers. The study demonstrates the usefulness of the Bayesian theory that gives more than a point estimation.

A multiple regression mod e l using two linear terms was employed to determine the influence of s now pack and reservoir storage on water availability for irrigation purposes during July, August , and September.

The Bayesian approach was employed. The optima l action ...


The Annual Demography Of A Population Of Antelope Ground Squirrels In Curiew Valley, Utah, James R. Kitts May 1970

The Annual Demography Of A Population Of Antelope Ground Squirrels In Curiew Valley, Utah, James R. Kitts

All Graduate Theses and Dissertations

The annual demography of a population of antelope ground squirrels in Curlew Valley, Utah was studied by measuring population density, natality, and mortality. Capture- recapture techniques yielded lower estimates than the Hayne strip- census. The estimates suggested 1968 was a year of population decline.

One hundred seventy- three squirrels were collected and autopsied to obtain sex ratio , age structure, natality, and mortality data . The seasonal sex ratios for adult and yearling squirrels showed 82 percent females in spring 1968, this gradually changed to 56 percent by winter . The seasonal sex ratios of the young squirrels showed 59 percent females upon ...


An Economic Analysis Of Selected Livestock Enterprises In Relation To The Available Feed Supplies, Utah, 1968, Ronald Jay Woolf May 1970

An Economic Analysis Of Selected Livestock Enterprises In Relation To The Available Feed Supplies, Utah, 1968, Ronald Jay Woolf

All Graduate Theses and Dissertations

A study was made to determine the relative profitability and competitive position of cattle fattening, lamb fattening, and milk production in the state of Utah for 1968.

Production costs of cattle fattening ranged from $22.10 to $32 .28 per hundred pounds of gain . Net return amounted to $19.65 per head. Lamb fattening costs ranged from $24.25 to $29.76 per hundred pounds of gain . Net return from lamb feeding operations averaged $2.06 per head . Cost of producing milk amounted to $4.90 per hundredweight while net return amounted to $.61 per hundredweight.

Measure of profitability used ...


Economics Of Size Of Cattle Ranches And Wheat Farms And A Comparison Of Management Alternatives For Marginal Cropland In Utah, John P. Workman May 1970

Economics Of Size Of Cattle Ranches And Wheat Farms And A Comparison Of Management Alternatives For Marginal Cropland In Utah, John P. Workman

All Graduate Theses and Dissertations

Five long-run average cost curves were derived from questionnaire and interview data by connecting points corresponding to the per unit production costs and levels of beef output for four cattle ranch sizes (50, 150, 300, and 500 head of breeding cows). Analysis of the long-run average cost curves in combination with the 1968 weighted Utah beef price revealed that all four ranch sizes studied are capable of meeting cash costs. If the goal of the ranch operator is to meet both cash costs and depreciation, a cattle ranch supporting 105 breeding cows is the minimum size necessary. If provision is ...


An Evaluation Of Factors Affecting Establishment And Survival Of Russian Wildrye (Elymus Junceus Fisch.) On Foothill Ranges In Utah, Dale Lynn Drawe May 1970

An Evaluation Of Factors Affecting Establishment And Survival Of Russian Wildrye (Elymus Junceus Fisch.) On Foothill Ranges In Utah, Dale Lynn Drawe

All Graduate Theses and Dissertations

Russian wildrye (Elymus junceus Fisch.) is a longlived perennial bunchgrass introduced to this continent from Siberia by the University of Saskatchewan in 1926 (Lawrence and Heinrichs, 1966). It is now widely distributed throughout the Northern Great Plains and Intermountain area (Figure 1). The species does well in the Northern Great Plains, but even though it is recommended for foothill ranges in the Intermountain area (Plummer, et aI, 1955), there are problems with establishment of Russian wildrye in the Intermountain area. This study was an attempt to fill in some of the gaps in the knowledge about establishment and survival of ...


A Study Of Root Biomass In An Engeimann Spruce-Subalpine Fir Stand In Northern Utah, Larry O. Gadt May 1970

A Study Of Root Biomass In An Engeimann Spruce-Subalpine Fir Stand In Northern Utah, Larry O. Gadt

All Graduate Theses and Dissertations

Biomass of roots in the top 6 inches of soil profile was measured . This weight was then used in a stepwise multiple regression to test correlations between root biomass and above ground merisurational parameters.

Total biomass of all roots was 9822 ± 2810 pounds per acre oven dry. Spruce roots weighed 4417 ± 997 pounds per acre; of this spruce roots less than 0.125 inch diameter weighed 2023 ± 347 pounds per acre and biomass of spruce roots greater than 0.125 inch diameter was 2394 ± 8S3 pounds per acre. Total fir roots weighed Sl56 ± 2687 pounds per acre; of this roots ...


Vocational Agricultural Curriculum Study In Utah County, Loren J. Phillips May 1970

Vocational Agricultural Curriculum Study In Utah County, Loren J. Phillips

All Graduate Theses and Dissertations

A questionnaire containing 69 curriculum areas for a vocational agricultural program in Utah County, Utah, and a proposed rating scale was mailed to 720 students who had graduated in vocational agriculture from eight high schools; to 14 agricultural teachers, and to 22 secondary school administrators and supervisors from Utah County; and to 28 other agricultural teachers selected at random in the state. Each person was asked to evaluate each curriculum area according to four suggested rating values: no value, has value, recommended, or essential.

The rating from each respondent was tabulated for each curriculum area by total points by numerical ...


Changes In The Market Structure Of The Grocery Retailing Industry Of Four Selected Utah Retail Selling Areas, 1960-1969, Michael H. Salsibury May 1970

Changes In The Market Structure Of The Grocery Retailing Industry Of Four Selected Utah Retail Selling Areas, 1960-1969, Michael H. Salsibury

All Graduate Theses and Dissertations

An analysis of four Utah retail selling areas was made to determine the changes in the market structure of the retail grocery industry of these markets. The study markets were Logan, Ogden, Salt Lake, and Provo-Orem. This study was an ex tension of the National Commission Food Marketing study of the retail food marketing industry.

The major changes observed in the study markets were increasing population, dollar food sa l es, supermarket saturation leve ls and concentration ratios. The number of retail food outlets was decreasing. The barriers to entry in the study markets increased during the study period.

There ...


Seasonal Utilization Of Sago Pondweed By Waterfowl At Bear River Migratory Bird Refuge, Utah, Michael R. Sterling May 1970

Seasonal Utilization Of Sago Pondweed By Waterfowl At Bear River Migratory Bird Refuge, Utah, Michael R. Sterling

All Graduate Theses and Dissertations

Seasonal utilization of sago pondweed (Potamogeton pectinatus L.) by waterfowl was studied at Bear River Miqratory Bird Refuge by comparing amounts of sago production on a series of plots on Unit Four. One plot was available to carp and waterfowl; one only to carp; and one available to neither.

The cage used to eliminate carp and waterfowl use of a plot caused a significant increase in sago production. The increase was attributed to less turbidity and less wind and wave action within the cage.

Carp distribution was limited to deep-water portions of Unit Four, a small area, and they had ...


An Economic Analysis Of Contour Furrows And Gully Checks On The Frail Lands Of Southeastern Utah, Karl A. Simonson May 1970

An Economic Analysis Of Contour Furrows And Gully Checks On The Frail Lands Of Southeastern Utah, Karl A. Simonson

All Graduate Theses and Dissertations

The upper Colorado River drainage system yields approximately 104,000 acre-feet of silt annually to the Colorado River. In an attempt to reduce the silt load, federal land management agencies have installed numerous land surface treatments. A study was conducted to measure the economic benefits of the land treatments near Cisco, Utah, and to compare them to the treatment costs and to develop predictive criteria for estimating the optimum intensity of treatment.

The economic evaluation was done in a benefit-cost framework and the criteria for estimating optimum intensity of treatment was done in a production-function framework.

The land treatments were ...