Search Results - "Popham, T.W."

Differentiating stress induced by greenbugs and Russian wheat aphids in wheat using remote sensing by Yang, Z., Rao, M.N., Elliott, N.C., Kindler, S.D., Popham, T.W.

“…Outbreaks of greenbug and Russian wheat aphid appear in the Great Plains almost every year and have had significant impacts on wheat yields. Early detection of…”
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Using ground-based multispectral radiometry to detect stress in wheat caused by greenbug (Homoptera: Aphididae) infestation by Yang, Z., Rao, M.N., Elliott, N.C., Kindler, S.D., Popham, T.W.

“…Greenbug ( Schizaphis graminum (Rondani)) outbreaks appear in the Great Plains almost every year and have had significant economic impacts on wheat and sorghum…”
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Disease Reaction among Selected Cucurbitaceae to an Acremonium cucurbitacearum Isolate from Texas by Bruton, B.D, Popham, T.W, Garcia-Jimenez, J, Armengol, J, Miller, M.E

“…Thirty-seven species within Cucurbitaceae representing the genera Citrullus, Cucumis, Cucurbita, Lagenaria, and Luffa were evaluated for disease reaction to an…”
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Validation of the wind erosion stochastic simulator (WESS) and the revised wind erosion equation (RWEQ) for single events by Van Pelt, R.S., Zobeck, T.M., Potter, K.N., Stout, J.E., Popham, T.W.

“…The wind erosion stochastic simulator (WESS) is a single event wind erosion model that is the core of the wind erosion submodel of the environmental policy…”
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Effect of dietary selenium supplementation on resistance to baculovirus infection by Popham, Holly J.R., Shelby, Kent S., Popham, Thomas W.

“…We have examined the effects of dietary selenium (Se) supplementation on larval growth and immunocompetence of the lepidopteran pest, the cabbage looper,…”
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A two-parameter Weibull function to describe airborne dust particle size distributions by Zobeck, Ted M., Gill, Thomas E., Popham, Thomas W.

“…A number of mathematical distributions have been proposed for the description of the particle size distribution of unconsolidated sediments. However, few…”
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Urea placement and nitrification inhibitor effects on growth and nitrogen accumulation by no-till winter wheat by Rao, S.C, Popham, T.W

“…Reduced forage production, grain yield, and visual N deficiency symptoms in no-till winter wheat (Triticum aestivum L.) prompted this study. Our objectives…”
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Wind erosion roughness index response to observation spacing and measurement distance by Zobeck, Ted M., Popham, Thomas W.

“…The cumulative shelter angle distribution (CSAD) is a physically-based roughness index that can be used to estimate the amount of soil surface impacted by…”
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Modification of the wind erosion roughness index by rainfall by Zobeck, Ted M., Popham, Thomas W.

“…The cumulative shelter angle distribution (CSAD) is a soil surface roughness index used in the “wind erosion prediction system” to estimate the fraction of the…”
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Dry aggregate size distribution of sandy soils as influenced by tillage and precipitation by Zobeck, T.M. (USDA, ARS, Conservation and Production Systems Research Unit, Big Spring, TX), Popham, T.W

“…Surface soil dry aggregate size distribution (ASD) has a significant effect on the amount and intensity of wind-induced soil erosion. The ASD of cropland…”
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