Search Results - "ELLSWORTH, T. R"

Synthetic Nitrogen Fertilizers Deplete Soil Nitrogen: A Global Dilemma for Sustainable Cereal Production by Mulvaney, R.L, Khan, S.A, Ellsworth, T.R

“…Cereal production that now sustains a world population of more than 6.5 billion has tripled during the past 40 yr, concurrent with an increase from 12 to 104…”
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The Myth of Nitrogen Fertilization for Soil Carbon Sequestration by Khan, S. A., Mulvaney, R. L., Ellsworth, T. R., Boast, C. W.

“…Intensive use of N fertilizers in modern agriculture is motivated by the economic value of high grain yields and is generally perceived to sequester soil…”
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The potassium paradox: Implications for soil fertility, crop production and human health by Khan, S.A., Mulvaney, R.L., Ellsworth, T.R.

“…Intensive fertilizer usage of KCl has been inculcated as a prerequisite for maximizing crop yield and quality, and relies on a soil test for exchangeable K in…”
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Need for a soil-based approach in managing nitrogen fertilizers for profitable corn production by Mulvaney, R.L, Khan, S.A, Ellsworth, T.R

“…Nitrogen fertilization for corn (Zea mays L.) production has relied extensively on yield-based recommendations that were developed to represent regional…”
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Effect of Water Flux on Solute Velocity and Dispersion by Shukla, M. K., Ellsworth, T. R., Hudson, R. J., Nielsen, D. R.

“…A systematic analysis of the effect of displacement length, soil texture, and steady state water flux (q) on solute transport was performed on saturated…”
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review of anthrax in Canada and implications for research on the disease in northern bison by Dragon, D.C, Elkin, B.T, Nishi, J.S, Ellsworth, T.R

“…During the first half of the century, the majority of anthrax outbreaks in Canada occurred in the southern portions of Ontario and Quebec and were often…”
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The Hook Lake Wood Bison Recovery Project: can a disease-free captive wood bison herd be recovered from a wild population infected with bovine tuberculosis and brucellosis? by Nishi, J S, Elkin, B T, Ellsworth, T R

“…The Hook Lake Wood Bison Recovery Project (HLWBRP) is a wildlife conservation project aimed at recovering a captive, disease-free herd of wood bison (Bison…”
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Solute transport in unsaturated soil: experimental design, parameter estimation, and model discrimination by Ellsworth, T.R., Shaouse, P.J., Jobes, J.A., Fargerlund, J., Skaggs, T.H.

“…The objectives of this study were to: (i) examine the efficacy of two sampling techniques for characterizing solute transport under steady-state water flow,…”
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Further insights into why potassium fertility is a paradox by Khan, S.A., Mulvaney, R.L., Ellsworth, T.R.

“…For many years, crop potassium (K) availability has been estimated by soil testing the plow layer for exchangeable K, in conjunction with potassium chloride…”
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Spatial structure of solute transport variability in a unsaturated field soil by Ellsworth, T. R., Boast, C. W.

“…Three solutes were applied in series under steady, unsaturated flow to determine the spatial scale dependence of transport. Twenty-seven days after solute…”
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Advanced information technologies for assessing nonpoint source pollution in the vadose zone: conference overview by Corwin, D. L., Loague, K., Ellsworth, T. R.

“…The information age has ushered in an awareness of and concern for global environmental problems such as climatic change, ozone depletion, deforestation,…”
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Irrigation and tillage management effects on solute movement by Bandaranayake, W.M, Butters, G.L, Hamdi, M, Prieksat, M, Ellsworth, T.R

“…In developing management practices to reduce chemical leaching below the root zone, tillage and irrigation management are important considerations. Two studies…”
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Tillage and cropping effects on preferential flow and solute transport by KAMAU, P. A, ELLSWORTH, T. R, BOAST, C. W, SIMMONS, F. W

“…Bromide was applied by spraying and chloride applied under ponded conditions to soil cropped to corn and soybean during vegetative and reproductive stages in…”
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Emergency response planning for anthrax outbreaks in bison herds of northern Canada: a balance between policy and science by Nishi, J S, Dragon, D C, Elkin, B T, Mitchell, J, Ellsworth, T R, Hugh-Jones, M E

“…Anthrax outbreaks in northern Canada have implications for ongoing recovery efforts for the threatened wood bison and may pose a health risk to humans, other…”
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Effects of moisture and sorption on bioavailability of p-hydroxybenzoic acid to Arthrobacter sp. in soil by Johnson, T.A., Sims, G.K., Ellsworth, T.R, Ballance, A.R.

“…Effects of bioavailability on degradation of 14C-p-hydroxybenzoate were examined using sterile soil inoculated with Arthrobacter sp. Physical accessibility of…”
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Using Rank‐Order Geostatistics for Spatial Interpolation of Highly Skewed Data in a Heavy‐Metal Contaminated Site by Juang, Kai‐Wei, Lee, Dar‐Yuan, Ellsworth, Timothy R.

“…ABSTRACT The spatial distribution of a pollutant in contaminated soils is usually highly skewed. As a result, the sample variogram often differs considerably…”
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Spatial interpolation methods for nonstationary plume data by Reed, P.M, Ellsworth, T.R, Minsker, B.S

“…Plume interpolation consists of estimating contaminant concentrations at unsampled locations using the available contaminant data surrounding those locations…”
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The challenge of predicting nonpoint source pollution by Loague, Keith, Corwin, Dennis L, Ellsworth, Timothy R

“…Evaluating the effect of agricultural practices on nonpoint source pollution is a key element of strategies to mitigate harmful environmental impacts. Keith…”
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The challenge of predicting nonpoint source pollution: GIS can assess soil and groundwater contamination by pollutants, but uncertainties must be quantified by LOAGUE, K, CORWIN, D. L, ELLSWORTH, T. R

“…Nonpoint source (NPS) pollutants threaten sustainable agriculture and are recognized as the single greatest threat to surface and subsurface drinking water…”
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Reply to Comments on “Synthetic Nitrogen Fertilizers Deplete Soil Nitrogen: A Global Dilemma for Sustainable Cereal Production,” by R.L. Mulvaney, S.A. Khan, and T.R. Ellsworth in the Journal of Environmental Quality 2009 38: 2295–2314 by Mulvaney, R. L., Khan, S. A., Ellsworth, T. R.

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