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ARS Home Midwest Area West Lafayette, Indiana National Soil Erosion Research Laboratory People







Mark  Williams    RES AGRI ENGR /ARSUserFiles/48978/mark-williams.JPG
 Contact: (765) 494-8694mark.williams2@usda.gov
 Mark Williams is a Research Agricultural Engineer studying water and nutrient transport in tile-drained landscapes throughout the Midwestern US. Mark is the site lead for the St. Joseph River Watershed Conservation Effects Assessment Project (CEAP) and co-lead for the Eastern Corn Belt Long-Term Agroecosystem Research (LTAR) Network site. **Education** 2008 – B.S., Environmental Resource Management, Penn State University2010 – M.S., Agricultural & Biological Engineering, Penn State University2013 – PhD, Agricultural & Biological Engineering, Penn State University **Experience** 2013-2016 – Post-doctoral Research Associate, USDA ARS Soil Drainage Research Unit, Columbus, OH2016-present – Research Agricultural Engineer, USDA ARS National Soil Erosion Research Lab, West Lafayette, IN **Publications** Publications indexed by Google ScholarClick here to view Google Scholar entries for Mark Williams in a new tab.   Publications(Clicking on the reprint iconReprint Icon  will take you to the publication reprint.)Uncertainty in phosphorus fluxes and budgets across the U.S. long-term agroecosystem research network-(Peer Reviewed Journal) Welikhe, P., Williams, M.R., King, K.W., Bos, J.H., Akland, M., Baffaut, C., Beck, G., Bierer, A.M., Bosch, D.D., Brooks, E., Buda, A.R., Cavigelli, M.A., Faulkner, J., Feyereisen, G.W., Fortuna, A., Gamble, J.D., Hanrahan, B.R., Hussain, M., Kovar, J.L., Lee, B., Leytem, A.B., Liebig, M.A., Line, D., Macrae, M., Moorman, T.B., Moriasi, D.N., Mumbi, R., Nelson, N., Ortega-Pieck, A., Osmond, D., Penn, C.J., Pisani, O., Reba, M.L., Smith, D.R., Unrine, J., Webb, P., White, K.E., Wilson, H., Witthaus, L.M. 2023. Uncertainty in phosphorus fluxes and budgets across the U.S. long-term agroecosystem research network. Journal of Environmental Quality. 52(4):837-885. https://doi.org/10.1002/jeq2.20485.Surface-to-tile drain connectivity and phosphorus transport: Effect of antecedent conditions-(Peer Reviewed Journal) Williams, M.R., Penn, C.J., King, K.W., Mcafee, S.J. 2023. Surface-to-tile drain connectivity and phosphorus transport: Effect of antecedent conditions. Hydrological Processes. 37(3). Article e14831. https://doi.org/10.1002/hyp.14831.SMAP soil moisture data assimilation on water quality and crop yield predictions in watershed modeling-(Peer Reviewed Journal) Pignotti, G., Crawford, M., Han, E., Williams, M.R., Chaubey, I. 2023. SMAP soil moisture data assimilation on water quality and crop yield predictions in watershed modeling. Journal of Hydrology. 617(C). Article: 129122. https://doi.org/10.1016/j.jhydrol.2023.129122.Can woodchip bioreactors be used at a catchment scale? Nitrate performance and sediment considerations-(Peer Reviewed Journal) Feyereisen, G.W., Ghane, E., Schumacher, T.W., Dalzell, B.J., Williams, M.R. 2023. Can woodchip bioreactors be used at a catchment scale? Nitrate performance and sediment considerations. Journal of the ASABE. 66(2):367-379. https://doi.org/10.13031/ja.15496.Twenty years of conservation effects assessment in the St. Joseph River watershed, Indiana-(Peer Reviewed Journal) Williams, M.R., Livingston, S.J., Duriancik, L.F., Flanagan, D.C., Frankenberger, J.R., Gillespie, R.B., Gonzalez, J.M., Huang, C., Penn, C.J., Smith, D.R., Renschler, C.S. 2023. Twenty years of conservation effects assessment in the St. Joseph River watershed, Indiana. Journal of Soil and Water Conservation. 78(1):12A-19A. https://doi.org/10.2489/jswc.2023.1204A.Dual-isotope approach for assessing agricultural management effects on nutrient dynamics: Proof of concept-(Peer Reviewed Journal) Bos, J.H., Williams, M.R., Penn, C.J., Smith, D.R. 2022. Dual-isotope approach for assessing agricultural management effects on nutrient dynamics: Proof of concept. Agrosystems, Geosciences & Environment. 5:e20306. https://doi.org/10.1002/agg2.20306.Source and transport controls on nutrient delivery to tile drains-(Peer Reviewed Journal) Williams, M.R., Penn, C.J., Mcafee, S.J. 2022. Source and transport controls on nutrient delivery to tile drains. Journal of Hydrology. 612(B).Article 127146. https://doi.org/10.1016/j.jhydrol.2022.128146.Thermal hydraulic disaggregation of SMAP soil moisture over continental United States-(Peer Reviewed Journal) Liu, P., Bindlish, R., O'Neil, P., Fang, B., Lakshmi, V., Yang, Z., Cosh, M.H., Bongiovanni, T., Holifield Collins, C.D., Starks, P.J., Prueger, J.H., Bosch, D.D., Seyfried, M.S., Williams, M.R. 2022. Thermal hydraulic disaggregation of SMAP soil moisture over continental United States. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 15:4072-4093. https://doi.org/10.1109/JSTARS.2022.3165644.P-FLUX: A phosphorus budget dataset spanning diverse agricultural production systems in the United States and Canada-(Peer Reviewed Journal) Williams, M.R., Welikhe, P., Bos, J.H., King, K.W., Akland, M., Augustine, D.J., Baffaut, C., Beck, G., Bierer, A.M., Bosch, D.D., Boughton, E., Brandani, C., Brooks, E., Buda, A.R., Cavigelli, M.A., Faulkner, J., Feyereisen, G.W., Fortuna, A., Gamble, J.D., Hanrahan, B.R., Hussain, M., Kohmann, M., Kovar, J.L., Lee, B., Leytem, A.B., Liebig, M.A., Line, D., Macrae, M., Moorman, T.B., Moriasi, D.N., Nelson, N., Ortega-Pieck, A., Osmond, D., Pisani, O., Ragosta, J., Reba, M.L., Saha, A., Sanchez, J., Silveira, M., Smith, D.R., Spiegal, S.A., Swain, H., Unrine, J., Webb, P., White, K.E., Wilson, H., Witthaus, L.M. 2022. P-FLUX: A phosphorus budget dataset spanning diverse agricultural production systems in the United States and Canada. Journal of Environmental Quality. 51:451–461. https://doi.org/10.1002/jeq2.20351.Desorption kinetics of legacy soil phosphorus: Implications for non-point transport and plant uptake-(Peer Reviewed Journal) Penn, C.J., Williams, M.R., Camberato, J., Wenos, N., Wason, H. 2022. Desorption kinetics of legacy soil phosphorus: Implications for non-point transport and plant uptake. Soil Systems. 6:6. https://doi.org/10.3390/soilsystems6010006.LTAR Phosphorus Budget Dataset-(Other) Williams, M.R., Weilkhe, P., Bos, J.H., King, K.W., Akland, M., Augustine, D.J., Baffaut, C., Beck, G., Bierer, A.M., Bosch, D.D., Boughton, E., Brandani, C., Brooks, E., Buda, A.R., Cavigelli, M.A., Faulkner, J., Feyereisen, G.W., Fortuna, A., Gamble, J.D., Hanrahan, B.R., Hussain, M., Kohmann, M., Kovar, J.L., Lee, B., Leytem, A.B., Liebig, M.A., Line, D., Macrae, M., Moorman, T.B., Moriasi, D.N., Nelson, N., Ortega-Pieck, A., Osmond, D., Pisani, O., Ragosta, J., Reba, M.L., Saha, A., Sanchez, J., Silveira, M., Smith, D.R., Spiegal, S.A., Swain, H., Unrine, J., Webb, P., White, K.E., Wilson, H., Witthaus, L.M. 2022. LTAR Phosphorus Budget Dataset. Ag Data Commons. https://doi.org/10.15482/USDA.ADC/1523365.The Conservation Effects Assessment Project - Watershed Assessment Studies Network-(Government Publication) Baffaut, C., Moriasi, D.N., Duriancik, L., Tsegaye, T.D., Bjorneberg, D.L., Bosch, D.D., Faulkner, J., Harter, T., Huang, C., Johnson, L., King, K.W., Kisekka, I., Kleinman, P.J., Lizotte Jr, R.E., Locke, M.A., Mccarty, G.W., Moorman, T.B., Reba, M.L., Smith, D.R., Wang, D., Williams, M.R., Wilson, G.V. 2021. The Conservation Effects Assessment Project - Watershed Assessment Studies Network [brochure]. Government Publication/Report. https://doi.org/10.32747/2021.8078214.nrcsStrong sensitivity of watershed-scale, ecohydrologic model predictions to soil moisture-(Peer Reviewed Journal) Pignotti, G., Rathjens, H., Chaubey, I., Williams, M.R., Crawford, M. 2021. Strong sensitivity of watershed-scale, ecohydrologic model predictions to soil moisture. Journal of Environmental Modeling and Software. 144. Article 105162. https://doi.org/10.1016/j.envsoft.2021.105162.Water storage, mixing, and fluxes in tile-drained agricultural fields inferred from stable water isotopes-(Peer Reviewed Journal) Williams, M.R., McAfee, S.J. 2021. Water storage, mixing, and fluxes in tile-drained agricultural fields inferred from stable water isotopes. Journal of Hydrology. 599. Article 126347. https://doi.org/10.1016/j.jhydrol.2021.126347.One size does not fit all: towards regional conservation practice guidance to reduce phosphorus loss risk in the Lake Erie watershed-(Peer Reviewed Journal) Macrae, M., Jarvie, H., Brouwer, R., Gunn, G., Reid, K., Joosse, P., King, K.W., Kleinman, P.J., Smith, D.R., Williams, M.R., Zwonitzer, M. 2021. One size does not fit all: towards regional conservation practice guidance to reduce phosphorus loss risk in the Lake Erie watershed. Journal of Environmental Quality. 50(3):529-546. https://doi.org/10.1002/jeq2.20218.Long-term effect of poultry litter application on phosphorus balances and runoff losses-(Peer Reviewed Journal) Bos, J.H., Williams, M.R., Smith, D.R., Armstrong, S., Harmel, R.D. 2021. Long-term effect of poultry litter application on phosphorus balances and runoff losses. Journal of Environmental Quality. 50(3):639-652. https://doi.org/10.1002/jeq2.20219.Evaluating soil water routing approaches in watershed-scale, ecohydrologic modelling-(Peer Reviewed Journal) Pignotti, G., Cherkauer, K., Crawford, M., Williams, M.R., Chaubey, I. 2021. Evaluating soil water routing approaches in watershed-scale, ecohydrologic modelling. Hydrological Processes. 35(3). Article e14034. https://doi.org/10.1002/hyp.14034.Stratified soil sampling improves predictions of P concentration in surface runoff and tile discharge-(Peer Reviewed Journal) Osterholz, W.R., King, K.W., Williams, M.R., Hanrahan, B.R., Duncan, E.W. 2020. Stratified soil sampling improves predictions of P concentration in surface runoff and tile discharge. Soil Systems. 4(4). Article 67. https://doi.org/10.3390/soilsystems4040067.Controls on subsurface nitrate and dissolved reactive phosphorus losses from agricultural fields during precipitation-driven events-(Peer Reviewed Journal) Hanrahan, B.R., King, K.W., Williams, M.R. 2020. Controls on subsurface nitrate and dissolved reactive phosphorus losses from agricultural fields during precipitation-driven events. Science of the Total Environment. 754. Article 142047. https://doi.org/10.1016/j.scitotenv.2020.142047.Preferential flow of surface-applied solutes: Effect of lysimeter design and initial soil water content-(Peer Reviewed Journal) Williams, M.R., Coronel, O., McAfee, S.J., Sanders, L.L. 2020. Preferential flow of surface-applied solutes: Effect of lysimeter design and initial soil water content. Vadose Zone Journal. 19:e20052. https://doi.org/10.1002/vzj2.20052.Changing rainfall patterns over the Western Lake Erie Basin (1975-2017): Effects on tributary discharge and phosphorus load-(Peer Reviewed Journal) Williams, M.R., King, K.W. 2020. Changing rainfall patterns over the Western Lake Erie Basin (1975-2017): Effects on tributary discharge and phosphorus load. Water Resources Research. 56(3). Article E2019WR025985. https://doi.org/10.1029/2019WR025985.Among-site variability in environmental and management characteristics: Effect on nutrient loss in agricultural tile drainage-(Peer Reviewed Journal) Hanrahan, B.R., King, K.W., Macrae, M.L., Williams, M.R., Stinner, J.H. 2020. Among-site variability in environmental and management characteristics: Effect on nutrient loss in agricultural tile drainage. Journal of Great Lakes Research. 46(3):486-499. https://doi.org/10.1016/j.jglr.2020.02.004.Performance of field-scale phosphorus removal structures utilizing steel slag for treatment of subsurface drainage-(Peer Reviewed Journal) Penn, C.J., Livingston, S.J., Shedkar, V., King, K.W., Williams, M.R. 2020. Performance of field-scale phosphorus removal structures utilizing steel slag for treatment of subsurface drainage. Water. 12(2). Article 443. https://doi.org/10.3390/w12020443.Evaluation of the Soil Vulnerability Index for artificially drained cropland across eight Conservation Effects Assessment Project watersheds-(Peer Reviewed Journal) Baffaut, C., Lohani, S., Thompson, A., Davis, A.R., Aryal, N., Bjorneberg, D.L., Bingner, R.L., Dabney, S.M., Duriancik, L.F., James, D.E., King, K.W., Lee, S., McCarty, G.W., Pease, L.A., Reba, M.L., Sadeghi, A.M., Tomer, M.D., Williams, M.R., Yasarer, L.M. 2020. Evaluation of the Soil Vulnerability Index for artificially drained cropland across eight Conservation Effects Assessment Project watersheds. Journal of Soil and Water Conservation. 75(1):28-41. https://doi.org/10.2489/jswc.75.1.28.Performance of the Soil Vulnerability Index with respect to slope, digital elevation model resolution, and hydrologic soil group-(Peer Reviewed Journal) Lohani, S., Baffaut, C., Thompson, A.L., Aryal, N., Bingner, R.L., Bjorneberg, D.L., Bosch, D.D., Bryant, R.B., Buda, A.R., Dabney, S.M., Davis, A.R., Duriancik, L.F., James, D.E., King, K.W., Kleinman, P.J., Locke, M.A., McCarty, G.W., Pease, L.A., Reba, M.L., Smith, D.R., Tomer, M.D., Veith, T.L., Williams, M.R., Yasarer, L.M. 2020. Performance of the Soil Vulnerability Index with respect to slope, digital elevation model resolution, and hydrologic soil group. Journal of Soil and Water Conservation. 75(1):12-27. https://doi.org/10.2489/jswc.75.1.12.Dye tracers reveal potential edge-flow effects in undisturbed lysimeters sealed with petrolatum-(Peer Reviewed Journal) Williams, M.R., McAfee, S.J., Kent, B.E. 2019. Dye tracers reveal potential edge-flow effects in undisturbed lysimeters sealed with petrolatum. Vadose Zone Journal. 8:190040. https://doi.org/10.2136/vzj2019.04.0040.Evaluating hydrologic response in tile drained landscapes: Implications for phosphorus transport-(Peer Reviewed Journal) Macrae, M., Ali, G., King, K.W., Plach, J., Pluer, W., Williams, M.R., Morrison, M., Tang, W. 2019. Evaluating hydrologic response in tile drained landscapes: Implications for phosphorus transport. Journal of Environmental Quality. 48(5):1347-1355. https://doi.org/10.2134/jeq2019.02.0060.The past, present, and future of blind inlets as a surface water best management practice-(Peer Reviewed Journal) Penn, C.J., Gonzalez, J.M., Williams, M.R., Smith, D.R., Livingston, S.J. 2019. The past, present, and future of blind inlets as a surface water best management practice. Critical Reviews in Environmental Science Technology. 50(7):743-768. https://doi.org/10.1080/10643389.2019.1642836.Thresholds for runoff generation in a drained closed depression-(Peer Reviewed Journal) Williams, M.R., Livingston, S.J., Heathman, G.C., McAfee, S.J. 2019. Thresholds for runoff generation in a drained closed depression. Hydrological Processes. https://doi.org/10.1002/hyp.13477.Reducing the impacts of agricultural nutrients on water quality across a changing landscape-(Peer Reviewed Journal) Peterson, H., Williams, M.R., Frankenberger, J., King, K.W., McGrath, J., Moody, L., Ribaudo, M., Strock, J. 2019. Reducing the impacts of agricultural nutrients on water quality across a changing landscape. Council for Agricultural Science and Technology Issue Paper. 64:1-60.Nutrient balances influence hydrologic losses of nitrogen and phosphorus across agricultural fields in northwestern Ohio-(Peer Reviewed Journal) Hanrahan, B.R., King, K.W., Williams, M.R., Duncan, E.W., Pease, L.A., Labarge, G.A. 2019. Nutrient balances influence hydrologic losses of nitrogen and phosphorus across agricultural fields in northwestern Ohio. Nutrient Cycling in Agroecosystems. 113(3):231-245. https://doi.org/10.1007/s10705-019-09981-4.Hydrologic assessment of blind inlet performance in a drained closed depression-(Peer Reviewed Journal) Williams, M.R., Livingston, S.J., Penn, C.J., Gonzalez, J.M. 2020. Hydrologic assessment of blind inlet performance in a drained closed depression. Journal of Soil and Water Conservation. 75(3):352-361. https://doi.org/10.2489/jswc.75.3.352.CEAP in the Cedar Creek watershed-(Other) Williams, M.R., Livingston, S.J., Penn, C.J. 2018. CEAP in the Cedar Creek watershed. Laboratory Publication. 1(2):1-2.Advancing the sustainability of US agriculture through long-term research-(Peer Reviewed Journal) Kleinman, P.J., Spiegal, S.A., Rigby Jr., J.R., Goslee, S.C., Baker, J.M., Bestelmeyer, B.T., Boughton, R., Bryant, R.B., Cavigelli, M.A., Derner, J.D., Duncan, E.W., Goodrich, D.C., Huggins, D.R., King, K.W., Liebig, M.A., Locke, M.A., Mirsky, S.B., Moglen, G.E., Moorman, T.B., Pierson Jr., F.B., Robertson, G., Sadler, E.J., Shortle, J., Steiner, J.L., Strickland, T.C., Swain, H., Williams, M.R., Walthall, C.L., Tsegaye, T.D. 2018. Advancing the sustainability of US agriculture through long-term research. Journal of Environmental Quality. 47(6):1412-1425. https://doi.org/doi:10.2134/jeq2018.05.0171.A discussion on Mehlich-3 phosphorus extraction from the perspective of governing chemical reactions and phases: Impact of soil pH-(Peer Reviewed Journal) Penn, C.J., Rutter, E.B., Arnall, D.B., Camberato, J., Williams, M.R., Watkins, P. 2018. A discussion on Mehlich-3 phosphorus extraction from the perspective of governing chemical reactions and phases: Impact of soil pH. Agriculture. 8(7):106. https://doi.org/10.3390/agriculture8070106.Dominant glacial landforms of the lower Great Lakes region exhibit different soil phosphorus chemistry and potential risk for phosphorus loss-(Peer Reviewed Journal) Plach, J.M., Macrae, M.M., Williams, M.R., Lee, B.D., King, K.W. 2018. Dominant glacial landforms of the lower Great Lakes region exhibit different soil phosphorus chemistry and potential risk for phosphorus loss. Journal of Great Lakes Research. 44:1057-1067. https://doi.org/10.1016/j.jglr.2018.07.005.Assessing intra-event phosphorus dynamics in drainage water using phosphate stable oxygen isotopes-(Peer Reviewed Journal) Ford, W.I., Williams, M.R., Young, M.B., King, K.W., Fischer, E.N. 2018. Assessing intra-event phosphorus dynamics in drainage water using phosphate stable oxygen isotopes. Transactions of the ASABE. 61(4):1379-1392. https://doi.org/10.13031/trans.12804.Integrating temporal inequality into conservation planning to improve practice design and efficacy-(Peer Reviewed Journal) Williams, M.R., King, K.W., Penn, C.J. 2018. Integrating temporal inequality into conservation planning to improve practice design and efficacy. Journal of the American Water Resources Association. 54(5):1029-1054. https://doi.org/10.1111/1752-1688.12662.Isotopic (d18O/d2H) integrity of water samples collected and stored by automatic samplers-(Peer Reviewed Journal) Williams, M.R., Lartey, J.L., Sanders, L.L. 2018. Isotopic (d18O/d2H) integrity of water samples collected and stored by automatic samplers. Agricultural and Environmental Letters. 3:180009. doi:10.2134/ael2018.02.0009.Controls of event-based nutrient transport within nested headwater agricultural watersheds of the western Lake Erie basin-(Peer Reviewed Journal) Williams, M.R., Livingston, S.J., Penn, C.J., Smith, D.R., King, K.W., Huang, C. 2018. Controls of event-based nutrient transport within nested headwater agricultural watersheds of the western Lake Erie basin. Journal of Hydrology. 559:749-761.CEAP in the Cedar Creek watershed-(Other) Williams, M.R., Livingston, S.J. 2018. CEAP in the Cedar Creek watershed. USDA-Agricultural Research Service, National Soil Erosion Research Laboratory, West Lafayette, IN. 1(1):1-2.Fertilizer placement and tillage effects on phosphorus leaching in fine-textured soils-(Peer Reviewed Journal) Williams, M.R., King, K.W., Duncan, E.W., Pease, L.A., Penn, C.J. 2018. Fertilizer placement and tillage effects on phosphorus leaching in fine-textured soils. Soil and Tillage Research. 178:130-138.Upland and in-stream controls on baseflow nutrient dynamics in tile-drained agroecosystem watersheds-(Peer Reviewed Journal) Ford, W.I., King, K.W., Williams, M.R. 2018. Upland and in-stream controls on baseflow nutrient dynamics in tile-drained agroecosystem watersheds. Journal of Hydrology. 556:800-812.Phosphorus export from artificially drained fields across the Eastern corn belt-(Peer Reviewed Journal) Pease, L.A., King, K.W., Williams, M.R., Labarge, G.A., Duncan, E.W., Fausey, N.R. 2017. Phosphorus export from artificially drained fields across the Eastern corn belt. Journal of Great Lakes Research. doi.org/10.1016/j.jglr.2017.11.009.Dissolved organic carbon loading from the field to watershed scale in
tile-drained landscapes-(Peer Reviewed Journal) Williams, M.R., King, K.W., Fausey, N.R. 2017. Dissolved organic carbon loading from the field to watershed scale in tile-drained landscapes. Agricultural Water Management. 192:159-169.A possible trade-off between clean air and clean water-(Peer Reviewed Journal) Smith, D.R., Stephensen, M., King, K.W., Jarvie, H.P., Haney, R.L., Williams, M.R. 2017. A possible trade-off between clean air and clean water. Journal of Soil and Water Conservation. 72(4):75A-79A. doi:10.2489/jswc.72.4.75A.Addressing agricultural phosphorus loss in artificially drained landscapes with 4R nutrient management practices-(Peer Reviewed Journal) King, K.W., Williams, M.R., Smith, D.R., LaBarge, G.A., Reutter, J., Duncan, E.W., Pease, L.A. 2018. Addressing agricultural phosphorus loss in artificially drained landscapes with 4R nutrient management practices. Journal of Soil and Water Conservation. 73:35-47.Linking soil phosphorus to dissolved phosphorus losses in the midwest-(Peer Reviewed Journal) Duncan, E.W., King, K.W., Williams, M.R., LaBarge, G., Pease, L.A., Smith, D.R., Fausey, N.R. 2017. Linking soil phosphorus to dissolved phosphorus losses in the Midwest. Agricultural and Environmental Letters. doi: 10.2134/ael2017.02.0004.Phosphorus availability in Western Lake Erie Basin drainage waters: legacy evidence across spatial scales-(Peer Reviewed Journal) King, K.W., Williams, M.R., Johnson, L.T., Smith, D.R., LaBarge, G.A., Fausey, N.R. 2017. Phosphorus availability in Western Lake Erie Basin drainage waters: legacy evidence across spatial scales. Journal of Environmental Quality. 46:466-469.Modified APEX model for simulating macropore phosphorus contributions to tile drains-(Peer Reviewed Journal) Ford III, W.I., King, K.W., Williams, M.R., Confesor, R. 2016. Modified APEX model for simulating macropore phosphorus contributions to tile drains. Journal of Environmental Quality. doi:10.2134/jeq2016.06.0218.Hydrologic and biogeochemical controls on phosphorus export from western Lake Erie tributaries-(Peer Reviewed Journal) Williams, M.R., King, K.W., Baker, D., Johnson, L., Smith, D.R., Fausey, N.R. 2016. Hydrologic and biogeochemical controls on phosphorus export from western Lake Erie tributaries. Journal of Great Lakes Research. 42:1403-1411.Imaging hydrological processes in headwater riparian seeps with time-lapse electrical resistivity-(Peer Reviewed Journal) Williams, M.R., Buda, A.R., Singha, K., Folmar, G.J., Elliott, H.A., Schmidt, J.P. 2016. Imaging hydrological processes in headwater riparian seeps with time-lapse electrical resistivity. Groundwater. 55(1):136-148. doi:10.1111/gwat.12461.Edge-of-field evaluation of the Ohio phosphorus risk index-(Peer Reviewed Journal) Williams, M.R., King, K.W., Labarge, G., Confessor, R., Fausey, N.R. 2016. Edge-of-field evaluation of the Ohio phosphorus risk index. Journal of Environmental Quality. doi:10.2134/jeq2016.05.0198.Framework to parameterize and validate APEX to support deployment of the nutrient tracking tool-(Peer Reviewed Journal) Moriasi, D.N., King, K.W., Bosch, D.D., Bjorneberg, D.L., Teet, S.B., Guzman, J.A., Williams, M.R. 2016. Framework to parameterize and validate APEX to support deployment of the nutrient tracking tool. Agricultural Water Management. 177:146-164.Framework to parameterize and validate APEX to support deployment of the nutrient tracking tool-(Peer Reviewed Journal) Moriasi, D.N., Teet, S.B., Guzman, J.A., King, K.W., Bosch, D.D., Bjorneberg, D.L., Williams, M.R. 2016. Framework to parameterize and validate APEX to support deployment of the nutrient tracking tool. Agricultural Water Management. 177:146-164.Decreasing phosphorus loss in tile-drained landscapes using flue gas desulfurization gypsum-(Peer Reviewed Journal) King, K.W., Williams, M.R., Dick, W.A., LaBarge, G.A. 2016. Decreasing phosphorus loss in tile-drained landscapes using flue gas desulfurization gypsum. Journal of Environmental Quality. 45(5):1722-1730. doi:10.2134/jeq2016.04.0132.Assessment and synthesis of 50 years of published drainage phosphorus losses-(Peer Reviewed Journal) Christianson, L.E., Harmel, R.D., Smith, D.R., Williams, M.R., King, K.W. 2016. Assessment and synthesis of 50 years of published drainage phosphorus losses. Journal of Environmental Quality. 45:1467-1477. doi:10.2134/jeq2015.12.0593.Effect of tillage on macropore flow and phosphorus transport to tile drains-(Peer Reviewed Journal) Williams, M.R., King, K.W., Ford III, W.I., Buda, A.R., Kennedy, C.D. 2016. Effect of tillage on macropore flow and phosphorus transport to tile drains. Water Resources Research. 52:2868-2882.Managing acute phosphorus loss with fertilizer source and placement: Proof of concept-(Peer Reviewed Journal) Smith, D.R., Harmel, R.D., Williams, M.R., Haney, R.L., King, K.W. 2016. Managing acute phosphorus loss with fertilizer source and placement: Proof of concept. Agricultural and Environmental Letters. 1:1. doi:10.2134/ael2015.12.0015.Edge-of-field research to quantify the impacts of agricultural practices on water quality in Ohio-(Research Technical Update) Williams, M.R., King, K.W., Ford III, W.I., Fausey, N.R. 2016. Edge-of-field research to quantify the impacts of agricultural practices on water quality in Ohio. Journal of Soil and Water Conservation. 71:9A-12A.Uncertainty in nutrient loads from tile drained landscapes: Effect of sampling frequency, calculation algorithm, and compositing strategies-(Peer Reviewed Journal) Williams, M.R., King, K.W., Macrae, M.L., Ford III, W.I., Van Esbroeck, C., Brunke, R.I., English, M.C., Schiff, S.L. 2015. Uncertainty in nutrient loads from tile drained landscapes: Effect of sampling frequency, calculation algorithm, and compositing strategies. Journal of Hydrology. 530:306-316.Effect of crop type and season on nutrient leaching to tile drainage under a corn-soybean rotation-(Peer Reviewed Journal) King, K.W., Williams, M.R., Fausey, N.R. 2016. Effect of crop type and season on nutrient leaching to tile drainage under a corn-soybean rotation. Journal of Soil and Water Conservation. 71:56-58.Linking nitrogen management, seep chemistry, and stream water quality in two agricultural headwater watersheds-(Peer Reviewed Journal) Williams, M.R., Buda, A.R., Elliott, H.A., Collick, A.S., Dell, C.J., Kleinman, P.J. 2015. Linking nitrogen management, seep chemistry, and stream water quality in two agricultural headwater watersheds. Journal of Environmental Quality. 44(3):910-920.Sensitivity analysis of the agricultural policy/environmental extender (APEX) for phosphorus loads in tile-drained landscapes-(Peer Reviewed Journal) Ford III, W.I., King, K.W., Williams, M.R., Williams, J., Fausey, N.R. 2015. Sensitivity analysis of the agricultural policy/environmental extender (APEX) for phosphorus loads in tile-drained landscapes. Journal of Environmental Quality. 44:1099-1110. DOI:10.2134/jeq2014.12.0527.What is causing the harmful algal blooms in Lake Erie?-(Peer Reviewed Journal) Smith, D.R., King, K.W., Williams, M.R. 2015. What is causing the harmful algal blooms in Lake Erie? Journal of Soil and Water Conservation. 70(2):27A-29A.Sensitivity analysis of the Ohio phosphorus risk index-(Peer Reviewed Journal) Williams, M.R., King, K.W., Dayton, E., LaBarge, G. 2015. Sensitivity analysis of the Ohio phosphorus risk index. Transactions of the ASABE. 58(1):93-102.Influence of riparian seepage zones on nitrate variability in two agricultural headwater streams-(Peer Reviewed Journal) Williams, M.R., Buda, A.R., Elliott, H.A., Singha, K., Hamlett, J. 2015. Influence of riparian seepage zones on nitrate variability in two agricultural headwater streams. Journal of the American Water Resources Association. 51(4): 883-897. doi: 10.1111/1752-1688.12335.Drainage water management effects on tile dicharge and water quality-(Peer Reviewed Journal) Williams, M.R., King, K.W., Fausey, N.R. 2015. Drainage water management effects on tile dicharge and water quality. Agricultural Water Management. 148:43-51.Drainage water management effects on tile discharge and water quality-(Peer Reviewed Journal) Williams, M.R., King, K.W., Fausey, N.R. 2014. Drainage water management effects on tile discharge and water quality. Agricultural Water Management. 148:43-51.Contributions of systematic tile drainage to watershed scale phosphorus transport-(Peer Reviewed Journal) King, K.W., Williams, M.R., Fausey, N.R. 2014. Contributions of systematic tile drainage to watershed scale phosphorus transport. Journal of Environmental Quality. 44:486-494. DOI:10.2134/jeq2014.04.0149.Phosphorus transport in agricultural subsurface drainage: A review-(Peer Reviewed Journal) King, K.W., Williams, M.R., Macrae, M.L., Fausey, N.R., Smith, D.R., Frankenberger, J., Kleinman, P.J., Brown, L.C. 2014. Phosphorus transport in agricultural subsurface drainage: A review. Journal of Environmental Quality. 44(2):467-85. doi:10.2134/jeq2014.04.0163.Effect of subsurface drainage on streamflow in an agricultural headwater watershed-(Peer Reviewed Journal) King, K.W., Fausey, N.R., Williams, M.R. 2014. Effect of subsurface drainage on streamflow in an agricultural headwater watershed. Journal of Hydrology. 519:438-445.Groundwater flow path dynamics and nitrogen transport potential in the riparian zone of an agricultural headwater catchment-(Peer Reviewed Journal) Williams, M.R., Buda, A.R., Elliott, H., Hamlett, J., Boyer, E.W., Schmidt, J.P. 2014. Groundwater flow path dynamics and nitrogen transport potential in the riparian zone of an agricultural headwater catchment. Journal of Hydrology. 511:870-879.Applying hydropedology to nutrient management in the northeastern US: lessons learned from the Mahantango Creek Experimental Watershed-(Abstract Only) Buda, A.R., Williams, M.R., Folmar, G.J., Lin, H., Vitko, L.F., Kleinman, P.J., Bryant, R.B., Drohan, P.J. 2013. Applying hydropedology to nutrient management in the northeastern US: lessons learned from the Mahantango Creek Experimental Watershed [Abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No. 257-266.  ProjectsAssessing Legacy Phosphorus Losses from Fields and Watersheds in the Western Lake Erie BasinCooperative Agreement (A)Accession Number:438254Assessment of Sediment and Chemical Transport Processes for Developing and Improving Agricultural Conservation PracticesIn-House Appropriated (D)Accession Number:441760Improving Understanding of Soil Processes for Making More Informed Agricultural Management Decisions that Increase Agricultural Sustainability in the Central U.S.In-House Appropriated (D)Accession Number:445338Assessing Legacy Phosphorus losses from Fields and Watersheds in the Western Lake Erie BasinInteragency Reimbursable Agreement (I)Accession Number:437760FY 2022 Conservation Effects Assessment Project (CEAP) - Benchmark Watershed Assessment Studies (on croplands), NSEUInteragency Reimbursable Agreement (I)Accession Number:443201FY 2020 Conservation Effects Assessment Project (CEAP) - Benchmark Watershed Assessment Studies (on croplands)Interagency Reimbursable Agreement (I)Accession Number:439068FY 2021 Conservation Effects Assessment Project (CEAP) - Benchmark Watershed Assessment Studies (on Croplands) - NSEInteragency Reimbursable Agreement (I)Accession Number:441004Contribution of Legacy P to Watershed Outcomes - Phase 1 - NSEUInteragency Reimbursable Agreement (I)Accession Number:441147


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