Publications

SELECTED PUBLICATIONS

2020

Archer, D.W., M.A. Liebig, and S.L. Kronberg. 2020. Dryland crop production and economic returns for crop residue harvest or grazing. Agron. J. https://doi.org/10.1002/agj2.20100

Baffaut, C., Ghidey, F., Lerch, R.N., Veum, K.S., Sadler, E.J., Sudduth, K.A. and Kitchen, N.R. 2020. Effects of combined conservation practices on soil and water quality in the Central Mississippi River Basin. Journal of Soil and Water Conservation, 75(3):340-351; doi: https://doi.org/10.2489/jswc.75.3.340.

Claire Baffaut, John M. Baker, Joel A. Biederman, David D. Bosch, Erin S. Brooks, Anthony R. Buda, Eleonora M. Demaria, Emile H. Elias, Gerald N. Flerchinger, David C. Goodrich, Stephen K. Hamilton, Suart P. Hardegree, R.Daren Harmel, David L. Hoover, Kevin W. King, Peter J. Kleinman, Mark A. Liebig, Gregory W. McCarty, Glenn E. Moglen, Thomas G. Moorman, Daniel N. Moriasi, Jane Okalebo, Fred B. Pierson, Eric S. Russell, Nicanor Z. Saliendra, Amartya K. Saha, Douglas R. Smith, Lindsey M.W. Yasarer,
Comparative analysis of water budgets across the U.S. Long-Term Agroecosystem Research network, Journal of Hydrology, 2020, 125021, ISSN 0022-1694, https://doi.org/10.1016/j.jhydrol.2020.125021

Conway, L.S., M.A. Yost, N.R. Kitchen, K.A. Sudduth, R.E. Massey and E.J. Sadler. 2020. Cropping system and landscape characteristics influence long-term grain crop profitability. Agrosystems, Geosciences & Environment, 3(1): e20099; doi: https://doi.org/10.1002/agg2.20099.

Daniel N. Moriasi, Lisa F. Duriancik, E. John Sadler, Teferi Tsegaye, Jean L. Steiner, Martin A. Locke, Timothy C. Strickland and Deanna L. Osmond, Quantifying the impacts of the Conservation Effects Assessment Project watershed assessments: The first fifteen years Journal of Soil and Water Conservation May 2020, 75 (3) 57A-74A; DOI: https://doi.org/10.2489/jswc.75.3.57A 

Lohani, S., C. Baffaut, A.L. Thompson, N. Aryal, R.L. Bingner, D.L. Bjorneberg, D.D. Bosch, R.B. Bryant, A. Buda, S.M. Dabney, A.R. Davis, L.F. Duriancik, D.E. James, K.W. King, P.J.A. Kleinman, M. Locke, G.W. McCarty, L.A. Pease, M.L. Reba, D.R Smith, M.D. Tomer, T.L. Veith, M.R. Williams, and L.M.W. Yasarer. 2020. Performance of the Soil Vulnerability Index with respect to slope, digital elevation model resolution, and hydrologic soil group. J. Soil and Water Conservation. 75:12-27. doi:https://doi.org/10.2489/jswc.75.1.12.

Plummer, R.E., Hapeman, C.J., Rice, C.P., McCarty, G.W., Schmidt, W.F., Downey, P.M., Moorman, T.B., Douglas, E.A., Strickland, T.C., Pisani, O., Bosch, D.D., Elkin, K.R., Buda, A.R. 2020. Method to evaluate the age of groundwater inputs to surface waters by determining the chirality change of metolachlor ethanesulfonic acid (MESA) captured on a polar organic chemical integrative sampler (POCIS). Journal of Agricultural and Food Chemistry. 68(8):2297-2305. https://doi.org/10.1021/acs.jafc.9b06187. ARIS # 368786.

Rice, C., Hively, W.D., McCarty, G.W., Hapeman, C.J. 2020. Fluxes of agricultural nitrogen and metolachlor metabolites are highly correlated in a first order stream in Maryland, USA. Science of the Total Environment. 716:136590. https://doi.org/10.1016/j.scitotenv.2020.136590. ARIS # 368504.

Rotz, C.A., R.C. Stout, M.A. Holly, and P.J.A. Kleinman. 2020. Regional environmental assessment of dairy farms. J. Dairy Sci. 103:1-14 (in press). https://doi.org/10.3168/jds.2019-17388.

Webb NP, Kachergis E, Miller SW, McCord SE, Bestelmeyer BT, Brown JR, Chappell A, Edwards BL, Herrick JE, Karl JW, Leys JF, Metz LJ, Smarik S, Tatarko J, Van Zee JW, Zwicke G, 2020. Indicators and benchmarks for wind erosion monitoring, assessment and management. Ecological Indicators. Vol. 110, 105881. doi:https://doi.org/10.1016/j.ecolind.2019.105881. ARIS#: 367120.

Yasarer, L.M.W., Taylor, J., Rigby, J.R., and Locke, M.A. 2020. Trends in land use, irrigation, and streamflow alteration in the Mississippi River Alluvial Plain. Frontiers in Environmental Science. https://doi.org/10.3389/fenvs.2020.00066


2019

Alexander, J.R., J.M. Baker, R.T. Venterea, and J.A. Coulter. 2019. Kura clover living mulch reduces fertilizer N requirements and increases profitability of maize. Agronomy 9 (8) 432. Log #360630.

Demaria, E.M.C., Hazenberg, P., Scott, R.L., Meles, M., Nichols, M.H., Goodrich, D.C. 2019. Intensification of the North American Monsoon rainfall as observed from a long-term high-density gauge network. Geophysical Research Letter. 46(12): 6389-6847. https://doi.org/10.1029/2019GL082461.
https://www.tucson.ars.ag.gov/unit/publications/PDFfiles/2538.pdf

Moffet, C.A., S.P. Hardegree, J.T. Abatzoglou, K.C. Hegewisch, R.R. Reuter, R.L. Sheley, M.W. Brunson, G.N. Flerchinger, A.R. Boehm. 2019. Weather tools for retrospective assessment of restoration outcomes. Rangeland Ecology and Management 72:225-229.
Ackroyd, V.J., Cavigelli, M.A., Spargo, J.T., Davis, B., Garst, G. and Mirsky, S.B., 2019. Legume cover crops reduce poultry litter application requirements in organic systems. Agronomy Journal, 111(5), pp.2361-2369. ARIS # 357348

Colliander, A., T.J. Jackson, A. Berg, D. Bosch, T. Caldwell, S. Chan, M.H. Cosh, C.H. Collins, J. Martinez-Fernandez, H. McNairn, J. Prueger, P. Starks, J.P. Walker, and S.H. Yueh, 0: Effect of Rainfall Events on SMAP Radiometer-Based Soil Moisture Accuracy Using Core Validation Sites. J. Hydrometeor., 0, https://doi.org/10.1175/JHM-D-19-0122.1 ARIS # 365432.

Cosh, M H., White, W. A., Colliander, A., Jackson, T. J., Prueger, J. H., Hornbuckle, B. K., Hunt, E. R. 2019. Estimating Vegetation Water Content during the Soil Moisture Active Passive Validation Experiment 2016. Journal of Applied Remote Sensing 13 (1): 1–12. https://doi.org/10.1117/1.JRS.13.014516. ARIS # 357968.

Dold, C., Hatfield, J.L., Prueger, J.H., Moorman, T.B., Sauer, T.J., Cosh, M.H., Drewry, D.T., Wacha, K.M. 2019. Upscaling Gross Primary Production in corn-soybean rotation systems in the Midwest. Remote Sensing. 11(14):1688. https://doi.org/10.3390/rs11141688. ARIS # 364290.

Duncan, E. P.J.A. Kleinman, D.B. Beegle, C.J. Dell. 2019. Nutrient cycling trade-offs with broadcasting and injecting dairy manure. Nutrient Cycling in Agroecosystems. DOI: https://doi.org/10.1007/s10705-019-09975-2

Amin, M.G., T.L. Veith, J. Shortle, H.D. Karsten, and P.J. Kleinman. 2019. Addressing the spatial disconnect between national-scale total maximum daily loads and localized land management decisions. J. Environmental Quality.
https://doi.org/10.1002/jeq2.20051

Sharpley, A., M. Helmers, P. Kleinman, K. King, A. Leytem and N. Nelson. 2019. Managing crop nutrients to achieve water quality goals. J. Soil Water Conserv. 74: 91A-101A.

Kleinman, P., R.M. Fanelli, R.M. Hirsch, A.R. Buda, Z. Easton, L. Wainger, C. Brosch, M. Lowenfish, A. Collick, A. Shirmohammadi, K. Boomer, J. Hubbart, R. Bryant and G. Shenk. 2019. Phosphorus and the Chesapeake Bay – Lingering issues and emerging concerns for agriculture. J Environ Qual. 48: 1191-1203. DOI: https://doi.org/10.2134/jeq2019.03.0112.

Smith, D.R., M.L. Macrae, P.J.A. Kleinman, H.P. Jarvie, K.W. King and R.B. Bryant. 2019. The latitudes, attitudes and platitudes of watershed phosphorus management in North America. J Journal of Environmental Quality 48(5) · September 2019
https://doi.org/10.2134/jeq2019.03.0136

Ma, L., Derner, J.D., Harmel, R.D., Tatarko, J., Moore, A., Rotz, C.A., Augustine, D.J., Boone, R., Coughenour, M. 2019. Application of grazing land models in ecosystem management: Current status and next frontiers. Advances in Agronomy. 158:173-216. https://doi.org/10.1016/bs.agron.2019.07.003.

Spiegal, S., Kleinman, P.J., Endale, D.M., Bryant, R.B., Dell, C., Goslee, S., Meinen, R.J., Flynn, C., Baker, J., Browning, D., McCarty, G., Bittman, S., Carter, J., Cavigelli, M., Duncan, E., Gowda, P., Li, X., Ponce-Campos, G.E., Raj, C., Silveira, M., Smith, D.R., Arthur, D.K., Yang, Q. Manuresheds: Advancing nutrient recycling in US agriculture. https:doi.org/10.1016/j.agsy.2020.102813

Steiner, J.L., Starks, P.J., Neel, J.P.S., Northup, B., Turner, K.E., Gowda, P., Coleman, S., and Brown, M. 2019. Managing tallgrass prairie for productivity and ecological function: a long-term grazing experiment in the Southern Great Plains, USA. Agronomy 9(11):699, https://doi:10.3390/agronomy9110699. ARIS Log# 365490

Scott, R.L., Biederman, J.A. 2019. Critical zone water balance over thirteen years in a semiarid savanna. Water Resources Research. 55:574-588. https://doi.org/10.1029/2018WR023477
https://www.tucson.ars.ag.gov/unit/publications/PDFfiles/2481.pdf ARIS # 354197

Tomer, M, KE Schilling, and KJ Cole. 2019. Nitrate on a slow decline: watershed water quality response during two decades of tallgrass prairie ecosystem reconstruction in Iowa. J Environ. Qual. 48:579–585. doi: http://doi.org/10.2134/jeq2018.07.0258 Log No 354577

Williams, C.J., Pierson Jr., F.B., Kormos, P.R., Al-Hamdan, O.Z., Nouwakpo, S.K., Weltz, M.A. 2019. Vegetation, Hydrologic, and Erosion Responses of Sagebrush Steppe 9 Yr Following Mechanical Tree Removal. Rangeland Ecology and Management. 72(1): 47-68.
https://www.tucson.ars.ag.gov/unit/publications/PDFfiles/2421.pdf ARIS # 346136

Wagle, P., Gowda, P.H., Northup, B.K., Starks, P.J., and Neel, J.P.S. 2019. Response of tallgrass prairie to management in the U.S. Southern Great Plains: site descriptions, management practices, and eddy covariance instrumentation for a long-term experiment. Remote Sensing, 11(17):1988, https://doi.org/10.3390/rs11171988. ARIS Log# 366385

Yan, D., Scott, R.L., Moore, D.J.P., Biederman, J.A., Smith, W.K. 2019. Understanding the relationship between vegetation greenness and productivity across dryland ecosystems through the integration of PhenoCam, satellite, and eddy covariance data. Remote Sensing and the Environment. 223:50-62. doi: 10.1016/j.rse.2018.12.029
https://www.tucson.ars.ag.gov/unit/publications/PDFfiles/2469.pdf ARIS # 351870

Yost, M.A., N.R. Kitchen, K.A. Sudduth, R.E. Massey, E.J. Sadler, S.T. Drummond and M.R. Volkmann (2019). “A long‑term precision agriculture system sustains grain profitability.” Precision Agriculture 20: 1177–1198.


2018

Delgado, J. A., Vandenberg, B., Kaplan, N., Neer, D., Wilson, G., D’Adamo, R., … Derner, J. D. (2018). Agricultural Collaborative Research Outcomes System (AgCROS): A network of networks connecting food security, the environment, and human health. Journal of Soil and Water Conservation , 73(6), 158A–164A. https://doi.org/10.2489/jswc.73.6.158A

Kleinman, P. J. A., S. Spiegal, J. R. Rigby, S. C. Goslee, J. M. Baker, B. T. Bestelmeyer, R. K. Boughton, R. B. Bryant, M. A. Cavigelli, J. D. Derner, E. W. Duncan, D. C. Goodrich, D. R. Huggins, K. W. King, M. A. Liebig, M. A. Locke, S. B. Mirsky, G. E. Moglen, T. B. Moorman, F. B. Pierson, G. P. Robertson, E. J. Sadler, J. S. Shortle, J. L. Steiner, T. C. Strickland, H. M. Swain, T. Tsegaye, M. R. Williams, and C. L. Walthall. 2018. Advancing the Sustainability of US Agriculture through Long-Term Research. J. Environ. Qual. 47:1412-1425. doi:10.2134/jeq2018.05.0171

S Spiegal, B T Bestelmeyer, D W Archer, D J Augustine, E H Boughton, R K Boughton,M A Cavigelli, P E Clark, J D Derner, E W Duncan, C J Hapeman, R D Harmel, P Heilman, M A Holly, D R Huggins, K King, P J A Kleinman, M A Liebig, M A Locke, G W McCarty, N Millar,S B Mirsky, T B Moorman, F B Pierson, J R Rigby, G P Robertson, J L Steiner, T C Strickland, H M Swain, B J Wienhold, J D Wulfhorst, M A Yost and C L Walthall (2018). Evaluating strategies for sustainable intensification of US agriculture through the Long-Term Agroecosystem Research network OPEN ACCESS Evaluating strategies for sustainable intensification of US agriculture through the Long-Term Agroecosystem Research n. Environmental Research Letters, 13, 34031.
https://doi.org/10.1088/1748-9326/aaa7


2017

Augustine, D.J., Derner, J.D., Milchunas, D., Blumenthal, D.M., Porensky, L.P. 2017. Grazing moderates increases in C3 grass abundance over seven decades across a soil texture gradient in shortgrass steppe. Journal of Vegetation Science DOI: https://doi.org/10.1111/jvs.12508

Porensky, L.M., Derner, J.D., Augustine, D.J., Milchunas, D.G. 2017. Plant community composition after 75 years of sustained grazing intensity treatments in shortgrass steppe. Rangeland Ecology & Management DOI: http://dx.doi.org/10.1016/j.rama.2016.12.001

Liebig, M.A., Herrick, J.E., Archer, D.W., Dobrowolski, J., Duiker, S.W., Franzluebbers, A.J., Hendrickson, J.R., Mitchell, R., Mohamed, A., Russell, J., Strickland, T.C.. 2017. Aligning land use with land potential: The role of integrated agriculture. Agricultural and Environmental Letters. 2:170007 doi: http://doi.org/10.2134/ael2017.03.0007

Prueger, J.H., Alfieri, J.G., Gish, T.J., Kustas, W.P., Hatfield, J.L., Daughtry, C.S.T., McKee, L.G. 2017. Multi-year measurements of field-scale metolachlor volatilization. Water, Air, and Soil Pollution, 228, 84 doi: https://doi.org/10.1007/s11270-017-3258-z

Dold, C., H. Buyukcangaz, W. Rondinelli, J.H. Preuger, T.J. Sauer, and J.L. Hatfield. 2017. Long-term carbon uptake in agro-ecosystems in the Midwest Agric. For. Meteorol. 232:128-140 DOI: https://doi.org/10.1016/j.agrformet.2016.07.012

Yost, M.A., Kitchen, N.R., Sudduth, K.A., Sadler, E.J., Drummond, S.T., and Volkmann, M.R. 2017. Long-term impact of a precision agriculture system on grain crop production. Precision Agriculture 18(5):823-842. doi: http://doi.org/10.1007/s11119-016-9490-5


2016

Chan, S., Bindlish, R., O’Neill, P., Njoku, E., Jackson, T.J., Colliander, A., Chen, F., Burgin, M., Dunbar, R., Peipmeier, J., Yueh, S., Entekhabi, D., Cosh, M.H., Caldwell, T., Walker, J., Wu, X., Berg, A., Rowlandson, T., Pacheco, A., McNairn, H., Thibeault, M., Martinez-Fernandez, J., Gonzalez-Zamora, A., Seyfried, M.S., Bosch, D.D., Starks, P.J., Goodrich, D.C., Prueger, J.H., Palecki, M., Small, E., Zreda, M., Calvet, J., Crow, W.T., Kerr, Y. 2016. Assessment of the SMAP level 2 passive soil moisture product. IEEE Transactions on Geoscience and Remote Sensing.. 54(8):1-14 doi: http://doi.org/10.1109/TGRS.2016.2561938

Christianson, L. E., Harmel, R. D., Smith, D., Williams, M. R., & King, K. 2016. Assessment and Synthesis of 50 Years of Published Drainage Phosphorus Losses. Journal of Environmental Quality, 45(5), 1467-1477 doi: http://doi.org/10.2134/jeq2015.12.0593

Lee, S., Yeo, I.Y., Sadeghi, A.M., Lang, M.W., McCarty, G.W., Hively, W.D. 2016. Impacts of watershed characteristics and crop rotations on winter cover crop nitrate –nitrogen uptake capacity within agricultural watershed in the Chesapeake Bay region. PLOS ONE J doi: http://doi.org/10.1371/journal.pone.0157637

Levi, M.R., Bestelmeyer, B.T.. 2016. Biophysical influences on the spatial distribution of fire in the desert grassland region of the southwestern USA. Landscape Ecology. 31(9):2079–2095 https://doi.org/10.1007/s10980-016-0383-9

Nicholas P. Webb , Jeffrey E. Herrick, Justin W. Van Zee, Ericha M. Courtright, Christopher H. Hugenholtz, Ted M. Zobeck, Gregory S. Okin, Thomas E. Barchyn, Benjamin J. Billings, Robert Boyd, Scott D. Clingan, Brad F. Cooper, Michael C. Duniway, Justin D. Derner, Fred A. Fox, Kris M. Havstad a , Philip Heilman, Valerie LaPlante, Noel A. Ludwig, Loretta J. Metz, Mark A. Nearing, M. Lee Norfleet, Frederick B. Pierson, Matt A. Sanderson, Brenton S. Sharratt, Jean L. Steiner, John Tatarko, Negussie H. Tedela, David Toledo, Robert S. Unnasch, R. Scott Van Pelt, Larry Wagner. 2016. The National Wind Erosion Research Network: Building a standardized long-term data resource for aeolian research, modeling and land management. Aeolian Research 22 (2016) 23–36.
http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcseprd1101806.pdf

Polyakov, V. O.; Nearing, M. A.; Stone, J. J.; Collins, C. D. Holifield; Nichols, M. H. 2016. Quantifying Decadal-Scale Erosion Rates And Their Short-Term Variability On Ecological Sites In A Semi-Arid Environment. CATENA 2016, 137, 501 – 507 DOI: http://doi.org/10.1016/j.catena.2015.10.023 

Porensky, L.M., Mueller, K.E., Augustine, D.J., Derner, J.D. 2016. Thresholds and gradients in a semi-arid grassland: long-term grazing treatments induce slow, continuous, and reversible vegetation change. Journal of Applied Ecology. 53:1013-1022 DOI: http://doi.org/10.1111/1365-2664.12630

Salley, S.W., Sleezer, R., Bergstrom, R., Martin, P., Kelly, E.. 2016. A Long-term analysis of the historical dry boundary for the Great Plains of North America: Implications of climatic variability and climatic change on temporal and spatial patterns in soil moisture. Geoderma. 274:104-113 https://doi.org/10.1016/j.geoderma.2016.03.020

Sanderson, M.A., Liebig, M.A, Hendrickson, J.R., Kronberg, S.L., Toledo, D.N., Derner, J.D., Reeves, J.L. 2016. A century of grazing: The value of long-term research. Journal of Soil and Water Conservation. 71(1):5A-8A DOI: http://doi.org/10.2489/jswc.71.1.5A

Tomer, M.D., T.B. Moorman, J.L. Kovar, K.J. Cole, and D.J. Nichols. 2016. Eleven years of runoff and phosphorus losses from two fields with and without manure application, Iowa USA. Agric. Wat. Manage. 168:104-111 DOI: http://doi.org/10.1016/j.agwat.2016.01.011

Yost, M.A., Kitchen, N.R., Sudduth, K.A., Sadler, E.J., Baffaut, C., Volkmann, M.R., Drummond, S.T. 2016. Long-term impacts of cropping systems and landscape positions on claypan soil grain crop production. Agron. J. 108(2):713-725 doi: http://doi.org/10.2134/agronj2015.0413

Williams, C.J., Pierson Jr, F.B., Kormos, P.R., Al-Hamdan, O.Z., Hardegree, S.P., Clark, P. 2016. Ecohydrologic response and recovery of a semi-arid shrubland over a five year period following burning. Catena. 144:163-176 doi: http://doi.org/10.1016/j.catena.2016.05.006

Williams, C.J., Pierson Jr, F.B., Spaeth, K.E., Brown, J.R., Al-Hamdan, O.Z., Weltz, M.A., Nearing, M.A., Herrick, J.E., Boll, J., Robichaud, P.R., Goodrich, D.C., Heilman, P., Guertin, P.D., Hernandez, M., Wei, H., Hardegree, S.P., Strand, E.K., Bates, J.D., Metz, L., Nichols, M.H. 2016. Incorporating hydrologic data and ecohydrologic relationships in ecological site descriptions. Rangeland Ecology and Management. 69:4-19 doi: http://dx.doi.org/10.1016/j.rama.2015.10.001

Williams, C.J., Pierson Jr, F.B., Spaeth, K.E., Brown, J.R., Al-Hamdan, O.Z., Weltz, M.A., Nearing, M.A., Herrick, J.E., Boll, J., Robichaud, P.R., Goodrich, D.C., Heilman, P., Guertin, P.D., Hernandez, M., Wei, H., Hardegree, S.P., Strand, E.K., Bates, J.D., Metz, L., Nichols, M.H. 2016. Incorporating hydrologic data and ecohydrologic relationships in ecological site descriptions. Rangeland Ecology and Management. 69:4-19 https://doi.org/10.1016/j.rama.2015.10.001


2015

Aguilar, J., G.G. Gramig, J.R. Hendrickson, D.W. Archer. F. Forcella, and M.A. Liebig. 2015. Crop diversity changes in the United States: 1978 – 2012. PLoS ONE 10(8): e0136580 doi: http://doi.org/10.1371/journal.pone.0136580

Baffaut, C., Ghidey, F., Sadler, E.J., Anderson, S.H. 2015. Long-term agroecosystem research in the central Mississippi River Basin: SWAT simulation of flow and water quality in the Goodwater Creek Experimental Watershed J. Environ. Qual. 44:84-96 doi: http://doi.org/10.2134/jeq2014.02.0068

Baffaut, C., Sadler, E.J., Ghidey, F. 2015. Long-term agroecosystem research in the Central Mississippi River Basin: Goodwater Creek Experimental Watershed flow data J. Environ. Qual. 44:18-27 doi: http://doi.org/10.2134/jeq2014.01.0008

Bestelmeyer, B.T., Okin, G., Duniway, M., Archer, S., Sayer, N., Williamson, J., Herrick, J.E. 2015. Desertification, land use, and the transformation of global drylands. Frontiers in Ecology and the Environment. 13:28-36 https://doi.org/10.1890/140162

Gelfand, I. and G. P. Robertson. 2015. A reassessment of the contribution of soybean biological nitrogen fixation to reactive N in the environment. Biogeochemistry 123:175-184 https://doi.org/10.1007/s10533-014-0061-4

Hatfield, J.L. 2015. Environmental impact of water use in agriculture. Agron. J. 107:1554-1556 DOI: http://doi.org/10.2134/agronj14.0064

Jean L. Steiner, Timothy Strickland, Peter J.A. Kleinman, Kris Havstad, Thomas B. Moorman, M. Susan Moran, Phil Heilman, Ray B. Bryant, David Huggins, and Greg McCarty. 2016. The Long Term Agroecosystem Research Network – Shared Research Strategy. p. 42-51. Proceedings of the Fifth Interagency Conference on Research in the Watersheds in Stringer, Christina E.; Krauss, Ken W.; Latimer, James S., eds. 2016. Headwaters to estuaries: advances in watershed science and management—Proceedings of the Fifth Interagency Conference on Research in the Watersheds. March 2-5, 2015, North Charleston, S outh Carolina. e-Gen. Tech. Rep. SRS-211. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 302 p.
http://www.srs.fs.usda.gov/pubs/gtr/gtr_srs211/gtr_srs211_014.pdf

King, K. W., Williams, M. R., & Fausey, N. R. 2015. Contributions of Systematic Tile Drainage to Watershed-Scale Phosphorus Transport Journal of Environmental Quality, 44(2), 486-494 doi: http://doi.org/10.2134/jeq2014.04.0149

Kitchen, N.R., Blanchard, P.E., Lerch, R.N. 2015. Long-term agroecosystem research in the Central Mississippi River Basin: hydrogeologic controls and crop management influence on nitrates in loess and fractured glacial till . J. Environ. Qual. 44:58-70 doi:http://doi.org/10.2134/jeq2014.09.0405

Lerch, R.N., Baffaut, C., Kitchen, N.R., Sadler, E.J. 2015. Long-term agroecosystem research in the Central Mississippi River Basin: dissolved nitrogen and phosphorus transport in a high-runoff-potential watershed J. Environ. Qual. 44:44-57 http://doi.org/10.2134/jeq2014.02.0059

Lerch, R.N., Baffaut, C., Sadler, E.J., Kremer, R.J. 2015. Long-term agroecosystem research in the Central Mississippi River Basin: Goodwater Creek Experimental Watershed and regional herbicide water quality data J. Environ. Qual. 44:28-36 doi: http://doi.org/10.2134/jeq2013.12.0516

Peters, D.C., Havstad, K.M., Archer, S.R., Sala, O.E.. 2015. Beyond desertification: New paradigms for dryland landscapes. Frontiers in Ecology and the Environment. 13:4-12 https://doi.org/10.1890/140276

Robertson, G. P.. 2015. A sustainable agriculture?. Daedalus 144:76-89 https://lter.kbs.msu.edu/pub/3503

Robertson, G. P. and S. K. Hamilton. 2015. Long-term ecological research in agricultural landscapes at the Kellogg Biological Station LTER site: Conceptual and experimental framework. Pages 1-32 in S. K. Hamilton, J. E. Doll, and G. P. Robertson, editors. The Ecology of Agricultural Landscapes: Long-Term Research on the Path to Sustainability. Oxford University Press, New York, New York, USA https://lter.kbs.msu.edu/docs/robertson/robertson__hamilton_2015_chapter1.pdf

Sadler, E. J., K. A. Sudduth, S. T. Drummond, E. D. Vories, and P. E. Guinan. 2015. Long-Term Agroecosystem Research in the Central Mississippi River Basin: Goodwater Creek Experimental Watershed Weather Data. J. Environ. Qual. 44:13-17. doi:10.2134/jeq2013.12.0515
https://dl.sciencesocieties.org/publications/jeq/pdfs/44/1/13

Sadler, E.J., Lerch, R.N., Kitchen, N.R., Anderson, S.H., Baffaut, C., Sudduth, K.A., Prato, A.A., Kremer, R.J., Vories, E.D., Myers, D.B., Broz, R., Miles, R.J., Young, J. 2015. Long-term agroecosystem research in the Central Mississippi River Basin: introduction, establishment, and overview J. Environ. Qual. 44:3-12 doi: http://doi.org/10.2134/jeq2014.11.0481

Sanderson, M.A., Liebig, M.A., Hendrickson, J.R., Kronberg, S.L., Toledo, D., Derner, J.D., Reeves, J.L. 2015. Long-term agroecosystem research on northern Great Plains mixed-grass prairie near Mandan, North Dakota Canadian Journal of Plant Science. 95:1101-1116 DOI: http://doi.org/10.4141/cjps-2015-117

Smith, D. R., King, K. W., Johnson, L., Francesconi, W., Richards, P., Baker, D., &Sharpley, A. N. 2015. Surface Runoff and Tile Drainage Transport of Phosphorus in the Midwestern United States Journal of Environmental Quality, 44(2), 495-502 doi: http://doi.org/10.2134/jeq2014.04.0176

Tomer, M.D., S.A. Porter, K.M.B. Boomer, D.E. James, J.A. Kostel, M.J. Helmers, T.M. Isenhart, and E. McLellan. 2015. Agricultural Conservation Planning Framework: 1. Developing multi-practice watershed planning scenarios and assessing nutrient reduction potential. J. Environ. Qual. 44(3):754-767 DOI: http://doi.org/10.2134/jeq2014.09.0386

Tomer, M.D., K.M.B. Boomer, S.A. Porter, B.K. Gelder, D.E. James, and E. McLellan. 2015. Agricultural Conservation Planning Framework: 2. Classification of riparian buffer design-types with application to assess and map stream corridors. J. Environ. Qual. 44(3):768-779 DOI: http://doi.org/10.2134/jeq2014.09.0387

Veum, K.S., R.J. Kremer, K.A. Sudduth, N.R. Kitchen, R.N. Lerch, C. Baffaut, et al. 2015. Conservation effects on soil quality indicators in the Missouri Salt River Basin. J. Soil Water Conserv. 70: 232-246.

Yahdjian, L., Sala, O., Havstad, K.M.. 2015. Rangeland ecosystem services: shifting focus from supply to reconciling supply and demand. Frontiers in Ecology and the Environment. 13:44-51 https://doi.org/10.1890/140156

Zhang, X., X. Lee, T.J. Griffis, A.E. Andrews, J. M. Baker, M.D. Erickson, N. Hu, and X. Wei. 2015. Quantiftying nitrous oxide fluxes on multiple spatial scales in the Upper Midwest , USA. Int. J. Biomet. 59:299-310 DOI: http://doi.org/10.1007/s00484-014-0842-4


2014

Cosh, M. H., Starks, P. J., Guzman, J. A., & Moriasi, D. N.. 2014. Upper Washita River experimental watersheds: Multiyear stability of soil water content profiles. Journal of Environmental Quality, 43(4), 1328-1333 doi: http://doi.org/10.2134/jeq2013.08.0318

Garbrecht, J. D., Nearing, M. A., Shields, F. D., Tomer, M. D., Sadler, E. J., Bonta, J. V., & Baffaut, C. 2014. Impact of weather and climate scenarios on conservation assessment outcomes. Journal of Soil and Water Conservation, 69(5), 374-392 doi: http://doi.org/10.2489/jswc.69.5.374

Garbrecht, J. D., Zhang, X. C., & Steiner, J. L.. 2014. Climate change and observed climate trends in the Fort Cobb experimental watershed. Journal of Environmental Quality, 43(4), 1319-1327 doi: http://doi.org/10.2134/jeq2013.07.0286

Gilmanov, T.G., J.M. Baker, C.J. Bernacchi, D.P. Billesbach, G.C. Burba, S. Castro, J. Chen, W. Eugster, M.L. Fischer, J.A. Gamon, M.T. Gebremedhin, A.J. Glenn, T.J. Griffis, J.L. Hatfield, M.W. Heuer, D.M. Howard, M.Y. Leclerc, H.W. Loescher, O. Marloie, T.P. Meyers, A. Olioso, R.L. Phillips, J.H. Preuger, R.H. Shkinner, A.E. Suyker, M. Tenuta, and B.K. Wylie. 2014. Productivity and carbon dioxide exchange of leguminous crops: estimates from flux tower measurements. Agron J. 106:545-559 DOI: http://doi.org/10.2134/agronj2013.0270

Guzman, J. A., Chu, M. L., Starks, P. J., Moriasi, D. N., Steiner, J. L., Fiebrich, C. A., & McCombs, A. G.. 2014. Upper Washita River experimental watersheds: Data screening procedure for data quality assurance. Journal of Environmental Quality, 43(4), 1250-1261 doi: http://doi.org/10.2134/jeq2013.08.0325

Harmel, R.D., Haney, R.L., Smith, D.R., King, K.W. 2014. USDA-ARS Riesel Watersheds, Riesel, Texas, USA: Water quality research database. Water Resources Research. 50:8374- 8382 https://doi.org/10.1002/2013WR015191

Jaynes, D.B., and T.M Isenhart. 2014. Reconnecting tile drainage to riparian buffer hydrology for enhanced nitrate removal. J. Environ. Qual. 43(2):631-638 DOI: http://doi.org/10.2134/jeq2013.08.0331

Karlen, D.L., D.E. Stott, C.A. Cambardella, R.J. Kremer, K.W. King, and G.W. McCarty. 2014. Surface soil quality in five midwestern cropland Conservation Effects Assessment Project watersheds. J. Soil Water Conserv. 69:393-401 DOI: http://doi.org/10.2489/jswc.69.5.393

Luyssaert, S., M. Jammet, P.C. Stoy, S. Estel, J. Pongratz, E. Ceschia, G. Churkina, A. Don, K.H. Erb, M.Ferlicoq, B. Gielen, T. Grünwald, R.A. Houghton, K. Klumpp, A. Knohl, T. Kolb, T. Kuemmerle, T. Laurila, A. Lohila, D. Loustau, M.J. McGrath, P. Meyfroidt, E.J. Moors, K. Naudts, K. Novick, J. Otto, K. Pilegaard, C.A. Pio, S. Rambal, C. Rebmann, J. Ryder, A.E. Suyker, A. Varlagin, M. Wattenbach, and A. J. Dolman. 2014. Land management and land-cover change have impacts of similar magnitude on surface temperature. Nature Climate Change, 4(5): 389-393 DOI: http://doi.org/10.1038/NCLIMATE2196

Moran, M.S., Ponce Campos, G., Huete, A., Mcclaran, M., Zhang, Y., Hamerlynck, E.P., Augustine, D.J., Gunter, S.A., Kitchen, S.G., Peters, D.C., Starks, P.J., Hernandez, M.. 2014. Functional response of U.S. grasslands to the early 21st century drought. Ecology. 95:2121-2133 https://doi.org/10.1890/13-1687.1

Moran, M. S. , Ponce-Campos, G. E., Huete, A., McClaran, M. P., Zhang, Y., Hamerlynck, E. P.,Hernandez, M. 2014. Functional response of U.S. grasslands to the early 21st-century drought. Ecology, 95(8), 2121-2133 doi: http://doi.org/10.1890/13-1687.1

M. Moran, S.; Ponce-Campos, G. E.; Huete, A. R.; McClaran, M. P.; Zhang, Y.; Hamerlynck, E. P.; Augustine, D. J.; Gunter, S. A.; Kitchen, S. G.; Peters, D. P. C.; Starks, P. J.; Hernandez, M. 2014. Functional Response Of U.s. Grasslands To The Early 21St-Century Drought. Ecology 2014, 95 (8), 2121 – 2133 DOI: http://doi.org/10.1890/13-1687.1 

Morgan, M.S., Ponce Campos, G., Huete, A., et al. 2014. Functional response of U.S. grasslands to the early 21st century drought Ecology. 95:2121-2133 DOI: http://doi.org/10.1890/13-1687.1

Moriasi, D. N., Starks, P. J., Guzman, J. A., Garbrecht, J. D., Steiner, J. L., Stoner, J. C., Naney, J. W.. 2014. Upper Washita river experimental watersheds: Reservoir, Groundwater, and stream flow data. Journal of Environmental Quality, 43(4), 1262-1272 doi: http://doi.org/10.2134/jeq2013.08.0329

Moriasi, D. N., Starks, P. J., Steiner, J. L., Guzman, J. A., Allen, P. B., & Naney, J. W.. 2014. Upper Washita river experimental watersheds: Physiography data. Journal of Environmental Quality, 43(4), 1298-1309 doi: http://doi.org/10.2134/jeq2013.08.0337

Peters, D.C., Loescher, H.W., Sanclements, M.D., Havstad, K.M.. 2014. Taking the pulse of a continent: Expanding site-based research infrastructure for regional- to continental-scale ecology. Ecosphere. 5(3): Article 29 https://doi.org/10.1890/ES13-00295.1

Rigby Jr, J.R., Locke, M.A. 2014. A framework for long-term monitoring and research for agricultural sustainability in the lower Mississippi River Basin. American Geophysical Union. December 15-19, 2014 N/A

Starks, P. J., Fiebrich, C. A., Grimsley, D. L., Garbrecht, J. D., Steiner, J. L., Guzman, J. A., & Moriasi, D. N. 2014. Upper Washita river experimental watersheds: Meteorologic and soil climate measurement networks. Journal of Environmental Quality, 43(4), 1239-1249 doi: http://doi.org/10.2134/jeq2013.08.0312

Starks, P. J., Steiner, J. L., Moriasi, D. N., Guzman, J. A., Garbrecht, J. D., Allen, P. B., & Naney, J. W. 2014. Upper Washita river experimental watersheds: Nutrient water quality data. Journal of Environmental Quality, 43(4), 1280-1297 doi: http://doi.org/10.2134/jeq2013.08.0309

Starks, P. J., Steiner, J. L., & Stern, A. J.. 2014. Upper Washita River experimental watersheds: Land cover data sets (1974-2007) for two southwestern Oklahoma agricultural watersheds. Journal of Environmental Quality, 43(4), 1310-1318 doi: http://doi.org/10.2134/jeq2013.07.0292

Steiner, J. L., Starks, P. J., Garbrecht, J. D., Moriasi, D. N., Zhang, X., Schneider, J. M., Osei, E. 2014. Long-term environmental research: The Upper Washita River experimental watersheds, Oklahoma, USA. Journal of Environmental Quality, 43(4), 1227-1238 doi: http://doi.org/10.2134/jeq2014.05.0229

Steiner, J. L., Starks, P. J., Garbrecht, J. D., Moriasi, D. N., Zhang, X., Schneider, J. M., Osei, E. 2014. Long-term environmental research: The Upper Washita River experimental watersheds, Oklahoma, USA. Journal of Environmental Quality, 43(4), 1227-1238 doi:http://doi.org/10.2134/jeq2014.05.0229

Syswerda, S. P. and G. P. Robertson. 2014. Ecosystem services along a management gradient in Michigan (USA) cropping systems. Agriculture, Ecosystems and Environment 189:28-35 https://doi.org/10.1016/j.agee.2014.03.006

Tomer, M.D., Sadler, E. J., Lizotte, R. E., Bryant, R. B., Potter, T. L., Moore, M.T., Veith, T. L., Baffaut, C., Locke, M.A., Walbridge, M.R.. 2014. A decade of conservation effects assessment research by the USDA Agricultural Research Service: Progress overview and future outlook. Journal of Soil and Water Conservation Vol. 69(5), 365-373 doi: http://doi.org/10.2489/jswc.69.5.365

Weltz, M.A., Jolley, L., Hernandez, M., Spaeth, K., Rossi, C., Talbot, C., Nearing, M.A., Stone, J.J., Goodrich, D.C., Wei, H., Pierson Jr, F.B., Morris, C.E. 2014. Estimating conservation needs for rangelands using USDA National Resources Inventory Assessments. American Society of Agricultural and Biological Engineers. 57(6):1-12 doi: http://hdl.handle.net/1957/55125

Weltz, M.A., Spaeth, K., Taylor, M.H., Rollins, K., Pierson, F., Jolley, L., Nearing, M., Goodrich, D., Hernandez, M., Nouwakpo, S.K., Rossi, C. 2014. Cheatgrass invasion and woody species encroachment in the Great Basin: Benefits of conservation. Journal of Soil and Water Conservation. 69(2):39A-44A doi: http://doi.org/10.2489/jswc.69.2.39A

Winstral, A.H., Marks, D.G. 2014. Long-term snow distribution observations in a mountain catchment: assessing variability, time stability, and the representativeness of an index site. Water Resources Research. 50:293-305 doi: http://doi.org/10.1002/2012WR013038

Xiao, J., S.V. Ollinger, S. Frolking, G.C. Hurtt, D.Y. Hollinger, K.J. Davis, Y. Pan, X. Zhang, F. Deng, J. Chen, D.D. Baldocchi, B.E. Law, M.A. Arain, A.R. Desai, A. D. Richardson, G. Sun, G., B. Amiro, H. Margolis, L. Gu, R.L. Scott, P.D. Blanken, A. Suyker. 2014. Data-driven diagnostics of terrestrial carbon dynamics over North America. Agricultural and Forest Meteorology, 197(0): 142 – 157 https://doi.org/10.1016/j.agrformet.2014.06.013

Zhang, X. C., Garbrecht, J. D., Steiner, J. L., & Blazs, R. L. 2014. Upper Washita River experimental watersheds: Sediment database. Journal of Environmental Quality, 43(4), 1273-1279 doi: http://doi.org/10.2134/jeq2013.07.0288

Zhang, X.; M. Moran, S.; Zhao, X.; Liu, S.; Zhou, T.; Ponce-Campos, G. E.; Liu, F. 2014. Impact Of Prolonged Drought On Rainfall Use Efficiency Using Modis Data Across China In The Early 21St Century. Remote Sensing of Environment 2014, 150, 188 – 197 DOI: http://doi.org/10.1016/j.rse.2014.05.003


2013

Gelfand, I., R. Sahajpal, X. Zhang, C.R. Izaurralde, K.L. Gross and G.P. Robertson. 2013. Sustainable bioenergy production from marginal lands in the US Midwest. Nature 493: 514-517 doi: http://doi.org/10.1038/nature11811

Hatfield, J.L., R.M. Cruse, and M.D. Tomer. 2013. Convergence of agricultural intensification and climate change in the Midwestern United States: implications for soil and water conservation. Mar. Freshwater Res. 64:423-435 DOI: http://doi.org/10.1071/MF12164

Lajtha, K. and J. Jones. 2013. Trends in cation, nitrogen, sulfate and hydrogen ion concentrations in precipitation in the United States and Europe from 1978 to 2010: A new look at an old problem. Biogeochemistry 116:303-334 https://doi.org/10.1007/s10533-013-9860-2

Ponce Campos, G., Moran, M.S., Huete, A., Zhang, Y., Bresloff, C., Huxman, T., Eamus, D., Bosch, D.D., Buda, A.R., Gunter, S.A., Scalley, T., Kitchen, S., McClaran, M., McNab, W., Montoya, D., Morgan, J.A., Peters, D.C., Sadler, E.J., Seyfried, M.S., Starks, P.J. 2013. Ecosystem resilience despite large-scale altered hydro climatic conditions. Nature. 494:349-352 doi: http://doi.org/10.1038/nature11836

Zhang, Y., Susan Moran, M., Nearing, M. A., Ponce Campos, G. E., Huete, A. R., Buda, A. R., Starks, P. J. 2013. Extreme precipitation patterns and reductions of terrestrial ecosystem production across biomes. Journal of Geophysical Research: Biogeosciences, 118(1), 148-157 doi: http://doi.org/10.1029/2012JG002136


2012

Bestelmeyer, B. T., R. E. Estell, and K. M. Havstad. 2012. Big questions emerging from a century of rangeland science and management. Rangeland Ecology & Management 65:543-544 https://doi.org/10.2111/REM-D-12-00112.1

Fay, P.A., Jin, V.L., Way, D.A., Potter, K.N., Gill, R.A., Jackson, R.B., Polley, H.W. 2012. Soil-mediated effects of subambient to increased carbon dioxide on grassland productivity. Nature Climate Change. 2:742-746 https://doi.org/10.1038/nclimate1573

Gitelson, A.A., Y. Peng, J. Masek, D.C. Rundquist, S. Verma, A. Suyker, J.M. Baker, J.L. Hatfield, and T. Meyers. 2012. Remote sensing of crop productivity with Landsat data. Remote Sensing Environ. 121:404-414 https://doi.org/10.1016/j.rse.2012.02.017

Moriasi, D. N., Wilson, B. N., Douglas-Mankin, K. R., Arnold, J. G., & Gowda, P. H. 2012. Hydrologic and water quality models: Use, calibration, and validation. Transactions of the ASABE, 55(4), 1241-1247 https://swat.tamu.edu/media/63553/ASABE55(4).asp.pdf

Osei, E., Moriasi, D., Steiner, J. L., Starks, P. J., & Saleh, A. 2012. Farm-level economic impact of no-till farming in the Fort Cobb Reservoir Watershed. Journal of Soil and Water Conservation, 67(2), 75-86 doi: http://doi.org/10.2489/jswc.67.2.75

Polley, H.W., Jin, V.L., Fay, P.A.. 2012. Feedback from plant species change amplifies CO2 enhancement of grassland productivity. Global Change Biology. 18:2813-2823 https://doi.org/10.1111/j.1365-2486.2012.02735.x

Robertson, G. P., S. L. Collins, D. R. Foster, N. Brokaw, H. W. Ducklow, T. L. Gragson, C. Gries, S. K. Hamilton, A. D. McGuire, J. C. Moore, E. H. Stanley, R. B. Waide, and M. W. Williams. 2012. Long-term ecological research in a human-dominated world. Bioscience 62:342-353 https://doi.org/10.1525/bio.2012.62.4.6

Syswerda, S. P., B. Basso, S. K. Hamilton, J. B. Tausig, and G. P. Robertson. 2012. Long-term nitrate loss along an agricultural intensity gradient in the Upper Midwest USA. Agriculture, Ecosystems & Environment 149:10-19 https://doi.org/10.1016/j.agee.2011.12.007


2011

Mark R. Walbridge and Steven R. Shafer. 2011. A Long-Term Agro-Ecosystem Research (LTAR) Network for Agriculture, The Fourth Interagency Conference on Research in the Watersheds, 26–30 September 2011, Fairbanks, AK.
https://www.ars.usda.gov/ARSUserFiles/np211/LTAR%20Walbridge%20and%20Shafer%202011%20Paper.pdf


2010

Nayak, A., Marks, D., Chandler, D., Seyfried, M. 2010. Long-term snow, climate and streamflow trends at the Reynolds Creek Experimental Watershed, Owyhee Mountains, Idaho, United States. Water Resources Research. 46(6):W06519 doi: http://doi.org/10.1029/2008WR007525


2008

Emmerich, W. E., and C. L. Verdugo. 2008. Long-term carbon dioxide and water flux database, Walnut Gulch Experimental Watershed, Arizona, United States. Water Resour. Res., 44, W05S09 DOI: http://doi.org/10.1029/2006WR005693

Feyereisen, G.W., Lowrance, R., Strickland, T.C., Bosch, D.D., Sheridan, J.M.. 2008. Long-term stream chemistry trends in the southern Georgia Little River Experimental watershed. Journal of Soil and Water Conservation 63(6): 475-486 doi: http://doi.org/10.2489/jswc.63.6.475

Goodrich, D. C., T. O. Keefer, C. L. Unkrich, M. H. Nichols, H. B. Osborn, J. J. Stone, and J. R. Smith. 2008. Long-term precipitation database, Walnut Gulch Experimental Watershed, Arizona, United States. Water Resour. Res., 44, W05S04 DOI: http://doi.org/10.1029/2006WR005782

Keefer, T. O., M. S. Moran, and G. B. Paige. 2008. Long-term meteorological and soil hydrology database, Walnut Gulch Experimental Watershed, Arizona, United States. Water Resour. Res., 44, W05S07 DOI: http://doi.org/10.1029/2006WR005702

M. Moran, S.; Peters, D. P. C.; McClaran, M. P.; Nichols, M. H.; Adams, M. B. 2008. Long-Term Data Collection At Usda Experimental Sites For Studies Of Ecohydrology. Ecohydrology 2008, 1 (4), 377 – 393 DOI: http://doi.org/10.1002/eco.24

G. Philip Robertson, Vivien G. Allen, George Boody, Emery R. Boose, Nancy G. Creamer, Laurie E. Drinkwater, James R. Gosz, Lori Lynch, John L. Havlin, Louise E. Jackson, Steward T. A. Pickett, Louis Pitelka, Alan Randall, A. Scott Reed, Timothy R. Seastedt, Robert B. Waide, And Diana H. Wall. 2008. Long-term Agricultural Research: A Research, Education, and Extension ImperativeBioScience, Vol. 58 No. 7.
http://bioscience.oxfordjournals.org/content/58/7/640.full

Stone, J. J., M. H. Nichols, D. C. Goodrich, and J. Buono. 2008. Long-term runoff database, Walnut Gulch Experimental Watershed, Arizona, United States. Water Resour. Res., 44, W05S05 DOI: http://doi.org/10.1029/2006WR005733


 

PUBLICATIONS UNDER DEVELOPMENT

  • LTAR and the Sustainability of US Agriculture
  • N2O
  • Budgets (H2O, C, N, P)
  • Biodiversity
  • Precipitation Intensification (All sites at Daily, sub-set of sites at sub-daily)
  • All sites SPEI (Standardized Precip Evap Index)
  • ARS CEAP watersheds (along with USGS NAWQA and NRCS CEAP)