Search Results - "Wauchope, R.D"

Bioavailability of xenobiotics in the soil environment by Katayama, Arata, Bhula, Raj, Burns, G Richard, Carazo, Elizabeth, Felsot, Allan, Hamilton, Denis, Harris, Caroline, Kim, Yong-Hwa, Kleter, Gijs, Koedel, Werner, Linders, Jan, Peijnenburg, J G M Willie, Sabljic, Aleksandar, Stephenson, R Gerald, Racke, D Kenneth, Rubin, Baruch, Tanaka, Keiji, Unsworth, John, Wauchope, R Donald

“…It is often presumed that all chemicals in soil are available to microorganisms, plant roots, and soil fauna via dermal exposure. Subsequent bioaccumulation…”
Get more information

Altered pesticide use on transgenic crops and the associated general impact from an environmental perspective by Kleter, Gijs A, Bhula, Raj, Bodnaruk, Kevin, Carazo, Elizabeth, Felsot, Allan S, Harris, Caroline A, Katayama, Arata, Kuiper, Harry A, Racke, Kenneth D, Rubin, Baruch, Shevah, Yehuda, Stephenson, Gerald R, Tanaka, Keiji, Unsworth, John, Wauchope, R. Donald, Wong, Sue-Sun

“…The large-scale commercial cultivation of transgenic crops has undergone a steady increase since their introduction 10 years ago. Most of these crops bear…”
Get full text

Foliar and Soil Deposition of Pesticide Sprays in Peanuts and Their Washoff and Runoff under Simulated Worst-Case Rainfall Conditions by Wauchope, R. Don, Johnson, W. Carroll, Sumner, Harold R

“…There are few studies that relate the timing and amounts of pesticide washoff from plant foliage during rainfall to runoff losses at the edge of the field. We…”
Get full text

Application of the Root Zone Water Quality Model (RZWQM) to pesticide fate and transport: an overview by Malone, R.W, Ahuja, L.R, Ma, L, Wauchope, R.D, Ma, Q, Rojas, K.W

“…Pesticide transport models are tools used to develop improved pesticide management strategies, study pesticide processes under different conditions…”
Get full text

Residual and contact herbicide transport through field lysimeters via preferential flow by Malone, R.W, Shipitalo, M.J, Wauchope, R.D, Sumner, H

“…Usage of glyphosate [N-(phosphonomethyl)-glycine] and glufosinate [2-amino-4-(hydroxy-methylphosphinyl)butanoic acid] may reduce the environmental impact of…”
Get full text

Documenting the pesticide processes module of the ARS RZWQM agroecosystem model by Wauchope, R.D, Rojas, K.W, Ahuja, L.R, Ma, Q, Malone, R.W, Ma, L

“…We describe the theory and current development state of the pesticide process module of the USDA-Agricultural Research Service Root Zone Water Quality Model,…”
Get full text

Effects of Simulated MSMA Drift on Rice (Oryza sativa) Growth and Yield by Richard, E. P., Hurst, H. R., Wauchope, R. D.

“…Levels of MSMA (monosodium methanearsonate) that simulated drift (0.2, 0.39, and 0.78 kg/ha) were applied over-the-top to rice (Oryza sativa L. ‘Vista’,…”
Get full text

Modeling hydrology, metribuzin degradation and metribuzin transport in the macroporous tilled and no-till silt loam soil using RZWQM by Malone, R.W, Ma, L, Wauchope, R.D, Ahuja, L.R, Rojas, K.W, Ma, Q, Warner, R, Byers, M

“…Due to the complex nature of pesticide transport, process-based models can be difficult to use. For example, pesticide transport can be effected by macropore…”
Get full text

Test of the Root Zone Water Quality Model (RZWQM) for predicting runoff of atrazine, alachlor and fenamiphos species from conventional-tillage corn mesoplots by Ma, Q, Wauchope, R.D, Ma, L, Rojas, K.W, Malone, R.W, Ahuja, L.R

“…The Root Zone Water Quality Model (RZWQM) is a comprehensive, integrated physical, biological and chemical process model that simulates plant growth and…”
Get full text

pesticide module of the Root Zone Water Quality Model (RZWQM): testing and sensitivity analysis of selected algorithms for pesticide fate and surface runoff by Ma, Q, Wauchope, R.D, Rojas, K.W, Ahuja, L.R, Ma, L, Malone, R.W

“…The Root Zone Water Quality Model (RZWQM) is a one-dimensional, numerical model for simulating water movement and chemical transport under a variety of…”
Get full text

Herbicide leaching as affected by macropore flow and within-storm rainfall intensity variation: a RZWQM simulation by Malone, R.W, Weatherington-Rice, J, Shipitalo, M.J, Fausey, N, Ma, L, Ahuja, L.R, Wauchope, R.D, Ma, Q

“…Within-event variability in rainfall intensity may affect pesticide leaching rates in soil, but most laboratory studies of pesticide leaching use a rainfall…”
Get full text

Soil Sample Variation and Herbicide Incorporation Uniformity by Wauchope, R.D., Chandler, J.M., Savage, K.E.

“…Copper sulfate (CuSO4 · 5H20) was used as a tracer to determine soil sample variation and the effects of incorporation and seedbed preparation practices on the…”
Get full text

Nitrate-nitrogen, soluble and bioavailable phosphorus runoff from simulated rainfall after fertilizer application by Gascho, G.J. (Crop and Soil Sciences Dep., University of Georgia.), Wauchope, R.D, Davis, J.G, Truman, C.C, Dowler, C.C, Hook, J.E, Sumner, H.R, Johnson, A.W

“…Runoff from crop land can enhance eutrophication of fresh water and hypoxia in sea water. We simulated rain at 25 mm hr-1 for 2 hr, 8 d prior and 1, 14, 29, 49…”
Get full text

Role of modeling in regulatory affairs, symposium at the weed science Society of America meetings, february 4th 1991, Louisville KY by WAUCHOPE, R.D, DUFFY, M.J

Get full text

Evapotranspiration predictions: a comparison among GLEAMS , Opus, PRZM-2, and RZWQM models in a humid and thermic climate by Ma, Q.L., Hook, J.E., Wauchope, R.D.

“…Environmental fate models are increasingly used to evaluate potential impacts of agrochemicals on water quality to aid in decision making. However, errors in…”
Get full text

Comparison of instantaneous equilibrium and equilibrium-kinetic sorption models for simulating simultaneous leaching and runoff of pesticides by Ma, Q.L. (USDA-ARS, Great Plains Systems Research Unit, Fort Collins, CO.), Ahuja, L.R, Wauchope, R.D, Benjamin, J.G, Burgoa, B

“…Leachate and runoff results from 4 boxes treated with pesticides and bromide tracer were compared with the simulated results from a root zone water quality…”
Get full text

Accelerated degradation of fenamiphos and its metabolites in soil previously treated with fenamiphos by Davis, R.F, Johnson, A.W, Wauchope, R.D

“…The degradation of fenamiphos, fenamiphos sulfoxide, and fenamiphos sulfone was determined in a greenhouse experiment using autoclaved and nonautoclaved soil…”
Get full text

Influence of tractor wheel tracks and crusts/seals on runoff: Observations and simulations with the RZWQM by Ma, Q.L., Wauchope, R.D., Hook, J.E., Johnson, A.W., Truman, C.C., Dowler, C.C., Gascho, G.J., Davis, J.G., Summer, H.R., Chandler, L.D.

“…In simulations on the fate of agricultural chemicals applied to crops, accurate partitioning of rainfall between infiltration and runoff is fundamental to…”
Get full text

Environmental risk assessment of pesticides: improving simulation model credibility by Wauchope, R.D

“…Registrant use of computer simulation modeling is generally accepted by regulators in lieu of some experimental data for risk assessment, provided worst-case…”
Get full text

Effect of simulated rainfall on leaching and efficacy of fenamiphos by Johnson, A.W. (USDA, ARS, Coastal Plain Station, Tifton, GA.), Wauchope, R.D, Burgoa, B

“…There is increasing concern in the United States about the pesticide movement in soil, groundwater contamination, and pesticide residue in food. The objective…”
Get full text