Browsing by Subject "Irrigation farming"
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Item Agricultural sustainabiltiy in the Texas High Plains: the role of advanced irrigation systems and biotechnology(Texas Tech University, 1998-12) Arabiyat, Talah S.The cunent state of ground water utilization in the Texas High Plains area is a reflection of the combined resuh of cunent economic, social and polkical factors. The main reason why ground water resources in the Texas High Plains are being used at a rate higher than the natural rate of recharge, is because of the revenues stemming from their cunent use being higher than the associated cost of extraction. However, water use in the Texas High Plains, given the critical dependence of the regional economy on this resource, is an inter-generational issue that must be evaluated in terms of the sustainability of agriculmral activities in the long-mn. For this reason, given the cunent state of economic, social and polkical factors, the sustainability of this resource needs to be better understood, given cunent and expected technological advances ki agriculmral production. In particular, advanced irrigation system technology can increase the efficiency of water utilization, and thus decrease the amount of water resources needed to produce a crop. However, these advanced irrigation system technologies can also induce the transition of previously irrigated cropland which is cunently under dryland production practices to revert back into krigation (Feng, 1992).Item Effect of irrigation emitter depth on yield and quality of potatoes(Texas Tech University, 1988-12) Carpio, Luis E. R.Not availableItem Spatial and temporal relationships between center pivot irrigation and groundwater resources on the Texas Southern High Plains(2012-05) Van-Nice, Chris; Mulligan, Kevin; Rainwater, Ken; Fish, Ernest B.; Lee, JeffreyThe purpose of this study is to investigate the geography of center pivot agriculture on the Texas Southern High Plains. The main goal is to better understand the spatial and temporal relationships between center pivot agriculture and groundwater resources in West Texas. Specifically this study addresses three research questions. 1) Has there been an increase in center pivot fields over time? 2) Is there a strong spatial relationship between center pivot fields and the saturated thickness of the aquifer? 3) Is there a strong spatial relationship between center pivot fields and the rates of aquifer depletion? Results from this research showed an increase in center pivot fields between 1995 and 2004, resulting in an increase in center pivot acreage in the region. The results from this study also support the idea that once the saturated thickness of the aquifer reaches 30 feet or less, it becomes difficult to support production level irrigated agriculture. The results from the aquifer depletion analysis showed a strong inverse relationship; as the center pivot acreage increased, the saturated thickness of the aquifer decreased in most cases.Item The effect of timing of a single summer irigation on yield and fiber properties of four stormproof cotton varieties of different maturity(Texas Tech University, 1966-08) Gunter, Billy C.Not availableItem Weed management with the computer-based Herbicide Application Decision Support System (HADSS) program(Texas Tech University, 2001-05) Lyon, Leanna L.Field experiments were initiated in 1999 and continued in 2000 to evaluate the Cotton Herbicide Application Decision Support System (HADSS®) program in Texas Southern High Plains cotton production. Weed management systems in the irrigated experiment were evaluated in a natural infestation of Palmer amaranth (Amaranthus palmeri S. Wats) and devil's-claw [Proboscidea louisianica (Mill.) Thellung], while the dryland experiment had Palmer amaranth, devil's-claw, and silverieaf nightshade {Solanum elaeagnifolium Cav.). Weed management systems evaluated were: (1) a preplant incorporated (PPI herbicide followed by (fb) postemergence HADSS® recommendations (PPI fb POST HADSS®); (2) postemergence HADSS® recommendations alone (POST HADSS®); and (3) Texas Agricultural Experiment Station (TAES) recommendations for the Texas Southern High Plains. All weed management systems were evaluated in glyphosate [A/-(phosphonomethyl) lycine]-tolerant, bromoxynil 3,5-dibromo-4-hydroxybenzonitrile)-tolerant, and conventional cotton varieties and each system was compared to an untreated and weed-free check in each variety. Weed control was evaluated approximately two weeks after each treatment and at harvest and cotton lint yields and net returns over weed control costs were determined for each weed management system.