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txspace.tamu.edu 檢索結果共 5447 筆,本頁資料從第 145 筆到第 156 筆

Irrigation is a major contributing factor in crop production on the Texas High Plains. It is responsible for greatly increasing crop production and farm income for the region. Two factors, a declining groundwater supply and increasing production costs, are of primary concern because they impact on farm operations and producer economic viability. A recursive linear prog....

By R. E. Whitson,D. C. Hardin,R. D. Lacewell,J. A. Petty--Texas Water Resources Institute--2007-12-05
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A study was conducted to develop automated pivot sprinkler irrigation systems and determine if such systems use less water and energy than manually operated systems. The study was conducted near Earth, Texas, using irrigation systems located on producers farms. Sensors with transmitters and receivers were constructed and tested so that the irrigation systems can be con....

By R. B. Hutmacher,H. P. III Harbert,M. D. Gerst,J. R. Runkles,C. W. Wendt--Texas Water Resources Institute--2007-12-05
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Fuel shortages and resultant rising fuel costs as well as federal policies prompting energy independence have served to encourage power companies to exploit available lignite deposits of the western states as a viable fuel source. Large reserves of lignite found in a northeasterly trending belt through Texas have been only partially tapped. To develop this natural resou....

By C. L. Cason,C. C. Mathewson--Texas Water Resources Institute--2007-12-05
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The U.S. Army Corps of Engineers (COE) has proposed a project that would reduce the flow from saline springs and seeps within the groundwater alluvium of the Red River Basin. While the amount of salts moving through the alluvium would be controlled by the project, total water quantity would not be appreciably affected. Presently, salinity levels in the basin are quite h....

By R. D. Lacewell,C. R. Taylor,T. Zacharias--Texas Water Resources Institute--2007-12-05
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Salinity of the waters from the Red River and its major tributaries has virtually eliminated its use for irrigation of agricultural crops in Texas and Oklahoma. A chloride control project has been proposed whereby the source salt waters will be captured and diverted to storage facilities. The purpose of this study was to estimate the net direct benefits to agricultural ....

By D. S. Moore,R. D. Lacewell,D. H. Laughlin--Texas Water Resources Institute--2007-12-05
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An adequate description of soil moisture movement is necessary for solution of agriculturally oriented problems such as irrigation, drainage and runoff control. Three approaches for determining the hydraulic properties of soil are in situ measurements, laboratory measurements and theoretical models. Field measurements, though representative, have the disadvantages of be....

By K. B. Humphreys,R. J. Newton,K. W. Brown,D. L. Reddell,M. J. McFarland,T. A. Howell--Texas Water Resources Institute--2007-12-05
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Past irrigation research on peanuts has shown that when the plant is exposed to soil moisture stress at different crop growth stages, different responses seem to exist between the Spanish and the Florunner peanut varieties. The Spanish peanuts appear more susceptible to soil moisture stress during the blooming and pegging stage, while the Florunners seem more susceptibl....

By P. Dahmen,R. J. Newton,K. W. Brown,D. L. Reddell,M. J. McFarland,T. A. Howell--Texas Water Resources Institute--2007-12-05
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The scientific design and management of a modern irrigation system requires that the designer or manager have knowledge of site and plant criteria such as infiltration, drainage, soil fertility, plant water needs, and plant production under varying conditions. With modern trickle systems water control is very precise and thus precise information on irrigation needs of a....

By E. L. Reeder,C. H. M. Van Bavel,P. B. Rodrigue,R. J. Newton,K. W. Brown,D. L. Reddell,M. J. McF--Texas Water Resources Institute--2007-12-05
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Irrigation is a major contributing factor in crop production on the Texas High Plains. It is responsible for greatly increasing crop production and farm income for the region. Two factors, a declining groundwater supply and increasing production costs, are of primary concern because they impact on farm operations and producer economic viability. Recursive linear progra....

By D. C. Hardin,R. E. Whitson,J. A. Petty,Ronald D. Lacewell--Texas Water Resources Institute--2007-12-04
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Past irrigation research has shown that peach (prunus persica) trees vary in their field response to water stress, and the degree of stress is a function of the plants' environment. Water deficits reduce plant growth and crop yields, therefore, measurements of plant water stress are fundamental in understanding how the environment affects plant performance. This in turn....

By J. W. Worthington,P. B. Rodrigue,M. J. McFarland,J. F. Punthakey--Texas Water Resources Institute--2007-12-04
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Trickle irrigation is the most efficient method of irrigating peach orchards in Texas. With a trickle irrigation system, a producer may make full use of a limited or low-volume water supply to apply precise amounts of water to the root zones of individual trees. Improved irrigation scheduling methods offer the potential for further savings in water and energy to pressur....

By J. W. Worthington,P. B. Rodrigue,J. F. Punthakey,M. J. McFarland--Texas Water Resources Institute--2007-12-04
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This study estimated the expected regional impact and economic feasibility of a proposed water accumulation or water saving option for agricultural producers operating in the Elephant Butte Irrigation District in southern New Mexico. The water accumulation plan would allow agricultural producers to retain part of a given year's surface water allocation in Elephant Butte....

By R. D. Lacewell,P. W. Teague,J. R. Ellis--Texas Water Resources Institute--2007-12-04
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