Life Sciences Commons^™

Bulletin No. 326 - Rainfall And Irrigation In Relation To Soil Erosion, Willard Gardner, John Hale Gardner, C. W. Lauritzen

UAES Bulletins

This paper attempts to point out to farmers, agricultural specialists, and others who may be interested, pertinent facts regarding rainfall intensity and other meteorological data that have to do with the wearing down of range and agricultural soils, and to present by means of diagrams illustrations of general relationships between the rate of wearing down of irrigated soils, the size of the irrigation stream and the slope of the eroding surface.

Large streams running down steep slopes, whether from rainfall or from irrigation, constitute a destructive process that cannot be completely controlled. Fortunately, vegetation protects the soil against the destructive …

Bulletin No. 325 - An Economic Study Of Sheep Production In Southwestern Utah, Dee A. Broadbent, George T. Blanch, W. Preston Thomas

UAES Bulletins

Range sheep production has been one of the major agricultural enterprises in Utah, particularly in the southwestern part of the state, since these areas were first settled. Stock sheep numbers in Utah were about 2,100,000 by 1890, which is approximately the present number in the state. Since 1890 the numbers have fluctuated between 2,000,000 and 2,775,000.

This important industry has, from the time of its introduction, been closely associated with the use of public range lands. The unrestricted grazing of public range lands resulted in damage to a considerable area and was one of the important factors that led to …

Bulletin No. 324 - Some Physical And Chemical Responses Of Agropyron Spicatum To Herbage Removal At Various Seasons, L. A. Stoddart

UAES Bulletins

Management of arid western ranges must be based upon the physiology of the individual plants which constitute the range. Too little is known of the ability of range plants to continue normal functioning under stress of grazing. Grazing doubtless has some beneficial influences in arid climates because it reduces transpiring surface. Possibly "pruning" has some stimulating effect, especially upon shrubs, and also, grazing animals plant seeds through trampling action. Despite these possible benefits, both trampling and removal of herbage by grazing must be .regarded as fundamentally detrimental to the welfare of plants, especially in arid climates. Trampling, especially on wet …

Bulletin No. 323 - Migration: A Problem Of Youth In Utah, Joseph A. Geddes

UAES Bulletins

Migration has always been a problem of major importance in Utah. During early days migration to the Mormon area was known as the "gathering". The concept was unusual because it included not only the searching out of those believed to be the "honest in heart" from many nations through an extensive missionary system, but also because it possessed an "idealogy" of planned building of what was expected to be superior communities (Zions) to engage the efforts and strivings of such people when brought together. It is in the development of this idealogy--this method of building a superior culture with the …

Bulletin No. 322 - Irrigation Companies In Utah: Their Activities And Needs, Orson W. Israelsen, J. Howard Maughan, George P. South

UAES Bulletins

Utah has approximately 700 irrigation companies having more than 8,750 miles of unlined earth canals, 410 pumping plants, 1,973 diversion dams and nearly 400 storage dams which provide a storage capacity for more than 3,400,000 acre-feet of water. More than 42 million dollars is invested in irrigation works, with at least 1.5 million dollars spent annually for maintenance.

Irrigation companies have the major responsibility for safe maintenance and efficient operation of Utah's dams, canals, spillways, waste-ways, flumes, inverted siphons, head gates and lateral gates--the structures with which irrigation water is stored, diverted, and conveyed to 1.3 million acres of productive …

Bulletin No. 320 - Soil Erosion In Small Irrigation Furrows, Orson W. Israelsen, George D. Clyde, Cyril W. Laurit

UAES Bulletins

This bulletin reports experimental procedure and data collected in a three-year study of the effect of irrigation furrow slopes and size of streams on the amounts of soil eroded from the furrows. Studies were made in 10 furrows on each of two farm experimental plots, the furrows being in different directions from a central water-stilling basin. The experimental plots were maintained fallow during the season--no crops were grown. Furrow slopes ranged from less than 1 percent to slightly more than 6 percent. Irrigation streams from 5 to 30 gallons per minute at the furrow inlet were measured first by means …