Research Publications



Conservation Chat: Implementing Iowa's Nutrient Reduction Strategy (Helmers) Video (2016).

Presentation: Nitrogen (Castellano, Helmers) Video.



Iowa Nutrient Reduction Strategy Annual Progress Report 2017-2018 (March 2019).

Iowa Nutrient Research Center Research Summary Handout (March 2016). 

Iowa Nutrient Research Center Accomplishments, 2013-2018 (November 2018).

Best Management Practices for Fall Grazing Cover Crops. Infographic - Iowa Beef Center. (November 2018). 

Iowa Prairie Seed Calculator. Tallgrass Prairie Center – University of Northern Iowa.

Linking Nutrient Reduction Practices with Biomass Energy: Quantifying Thermal Energy Demand and Supply Capacity for Representative Farms in Eastern Iowa. Tallgrass Prairie Center – University of Northern Iowa.

Reducing Nutrient Loss: Science Shows What Works - Iowa State University Extension and Outreach publication (SP435A/ rev. February 2017). 


Land Use

Acharya, J., M. G. Bakker, T. B. Moorman, T. C. Kaspar, A. W. Lenssen and A. E. Robertson (2017). "Time Interval Between Cover Crop Termination and Planting Influences Corn Seedling Disease, Plant Growth, and Yield." Plant Disease 101(4): 591-600.

Acharya, J., T. Kasper, T. Moorman, A. W. Lenssen and A. R. Robertson (2016). "Effect of cereal rye winter cover crop (Secale cereal) termination on corn seedling diseases." Phytopathology 106(1): S1-S1.

Basche, A. D., T. C. Kaspar, S. V. Archontoulis, D. B. Jaynes, T. J. Sauer, T. B. Parkin and F. E. Miguez (2016). "Soil water improvements with the long-term use of a winter rye cover crop." Agricultural Water Management 172: 40-50.           

Gassman, P. W., A. M. Valcu-Lisman, C. L. Kling, S. K. Mickelson, Y. Panagopoulos, R. Cibin, I. Chaubey, C. F. Wolter and K. E. Schilling (2017). "Assessment of Bioenergy Cropping Scenarios for the Boone River Watershed in North Central Iowa, United States." Journal of the American Water Resources Association 53(6): 1336-1354.

Jones, C.S., Seeman, A., Kyveryga, P.M., Schilling, K.E., Kiel, A., Chan, K.S. and Wolter, C.F., 2016. Crop rotation and Raccoon River nitrate. Journal of Soil and Water Conservation, 71(3), pp.206-219.

Lee, D., J. G. Arbuckle, Z. Y. Zhu and L. Nowatzke (2018). "Conditional Causal Mediation Analysis of Factors Associated With Cover Crop Adoption in Iowa, USA." Water Resources Research 54(11): 9566-9584.

Martinez-Feria, R. A., R. Dietzel, M. Liebman, M. J. Helmers and S. V. Archontoulis (2016). "Rye cover crop effects on maize: A system-level analysis." Field Crops Research 196: 145-159.

Roley, S. S., J. L. Tank, J. C. Tyndall and J. D. Witter (2016). "How cost-effective are cover crops, wetlands, and two-stage ditches for nitrogen removal in the Mississippi River Basin?" Water Resources and Economics 15: 43-56.

Schilling, K., 2017. How much do golf courses contribute to Gulf of Mexico hypoxia. Golf Course Manag, 17, pp.76-81.

Schilling, K.E. and Streeter, M.T., 2018. Groundwater Nutrient Concentrations and Mass Loading Rates at Iowa Golf Courses. JAWRA Journal of the American Water Resources Association54(1), pp.211-224.

Schulte, L. A., J. Niemi, M. J. Helmers, M. Liebman, J. G. Arbuckle, D. E. James, R. K. Kolka, M. E. O'Neal, M. D. Tomer, J. C. Tyndall, H. Asbjornsen, P. Drobney, J. Neal, G. Van Ryswyk and C. Witte. 2017. "Prairie strips improve biodiversity and the delivery of multiple ecosystem services from corn-soybean croplands." Proceedings of the National Academy of Sciences of the United States of America 114(42): 11247-11252.

Streeter, M.T., and K.E. Schilling. 2018. Effects of golf course management on subsurface soil properties in Iowa. Soil, 4(2), pp.93-100.

Tomer, M.D., K.E. Schilling, and K.J. Cole. 2019. Nitrate on a Slow Decline: Watershed Water Quality Response during Two Decades of Tallgrass Prairie Ecosystem Reconstruction in Iowa. Journal of Environmental Quality.

Edge of Field

Amado, A.A., M. Politano, K.E. Schilling, and L. Weber. 2016. Investigating hydrologic connectivity of a drained Prairie Pothole Region wetland complex using a fully integrated, physically-based model. Wetlands, pp.1-13.

Beck, W., T. Isenhart, P. Moore, K. Schilling, R. Schultz and M. Tomer. 2018. "Streambank Alluvial Unit Contributions to Suspended Sediment and Total Phosphorus Loads, Walnut Creek, Iowa, USA." Water 10(2).

Beck, W., T. Isenhart, P. Moore, K.E. Schilling, R. Schultz, and M. Tomer. 2018. Streambank alluvial unit contributions to suspended sediment and total phosphorus loads, Walnut Creek, Iowa, USA. Water10(2), p.111.

Beck, W. J., P. L. Moore, K. E. Schilling, C. F. Wolter, T. M. Isenhart, K. J. Cole and M. D. Tomer. 2019. "Changes in lateral floodplain connectivity accompanying stream channel evolution: Implications for sediment and nutrient budgets." Science of the Total Environment 660: 1015-1028.

Davis, M. P., T. A. Groh, T. B. Parkin, R. J. Williams, T. M. Isenhart and K. S. Hofmockel. 2018. "Portable Automation of Static Chamber Sample Collection for Quantifying Soil Gas Flux." Journal of Environmental Quality 47(2): 270-275.

Davis, M. P., T. A. Groh, D. B. Jaynes, T. B. Parkin and T. M. Isenhart. 2019. "Nitrous Oxide Emissions from Saturated Riparian Buffers: Are We Trading a Water Quality Problem for an Air Quality Problem?" Journal of Environmental Quality 48(2): 261-269.

Drake, C.W., C.S. Jones, K.E. Schilling, A.A. Amado, and L. J. Weber. 2017. "Estimating nitrate retention in a large constructed wetland using high-frequency, continuous monitoring and hydrologic modeling." In 2017 ASABE Annual International Meeting (p. 1). American Society of Agricultural and Biological Engineers.

Drake, C.W., Jones, C.S., Schilling, K.E., Amado, A.A. and Weber, L.J., 2018. "Estimating nitrate-nitrogen retention in a large constructed wetland using high-frequency, continuous monitoring and hydrologic modeling." Ecological Engineering117, pp.69-83.

Groh, T. A., M. P. Davis, T. M. Isenhart, D. B. Jaynes and T. B. Parkin. 2019. "In Situ Denitrification in Saturated Riparian Buffers." Journal of Environmental Quality 48(2): 376-384.

Hongthanat, N., J. L. Kovar, M. L. Thompson, J. R. Russell and T. M. Isenhart. 2016. "Phosphorus source-sink relationships of stream sediments in the Rathbun Lake watershed in southern Iowa, USA." Environmental Monitoring and Assessment 188(8).

Hoover, N. L., A. Bhandari, M. L. Soupir and T. B. Moorman. 2016. "Woodchip Denitrification Bioreactors: Impact of Temperature and Hydraulic Retention Time on Nitrate Removal." Journal of Environmental Quality 45(3): 803-812.

Hoover, N. L., M. L. Soupir, R. D. Vandepol, T. R. Goode and J. Y. Law. 2017. "Pilot-scale Denitrification Bioreactors for replicated field research." Applied Engineering in Agriculture 33(1): 83-90.

Jaynes, D. B. and T. M. Isenhart. 2019. "Performance of Saturated Riparian Buffers in Iowa, USA." Journal of Environmental Quality 48(2): 289-296.

Jones, C.S., and K.J. Kult. 2016. "Use alkalinity monitoring to optimize bioreactor performance." Journal of Environmental Quality 45(3): 855-865.

Law, J. Y., M. L. Soupir, D. R. Raman, and T. B. Moorman (2018). "Exploring multiple operating scenarios to identify low-cost, high nitrate removal strategies for electrically-stimulated woodchip bioreactors." Ecological Engineering 120: 146-153.     

Law, J. Y., M. L. Soupir, D. R. Raman, T. B. Moorman and S. K. Ong (2018). "Electrical stimulation for enhanced denitrification in woodchip bioreactors: Opportunities and challenges." Ecological Engineering 110: 38-47.

Martin, E.A., M.P. Davis, T.B. Moorman, T.M. Isenhart, M.L. Soupir (2019). Impact of hydraulic residence time on nitrate removal in pilot-scale woodchip bioreactors. Journal of Environmental Management 237: 424-432.

Moustakidis, I.V., Schilling, K.E. and Weber, L.J., 2019. "Soil total phosphorus deposition and variability patterns across the floodplains of an Iowa river." Catena, 174: 84-94.

Schilling, K.E., K. Kult, K. Wilke, M. Streeter, and J. Vogelgesang. 2017. "Nitrate reduction in a reconstructed floodplain oxbow fed by tile drainage." Ecological Engineering, 102: 98-107.

Schilling, K.E., Jacobson, P.J. and Wolter, C.F., 2018. Using riparian Zone scaling to optimize buffer placement and effectiveness. Landscape ecology33(1), pp.141-156.

Schilling, K.E., Kult, K., Seemon, A., Wilke, K. and Jones, C.S., 2018. Nitrate-N load reduction measured in a central Iowa restored oxbow. Ecological engineering124, pp.19-22.

Schilling, K.E., Streeter, M.T., Clair, M.S. and Meissen, J., 2018. Subsurface nutrient processing capacity in agricultural roadside ditches. Science of The Total Environment637, pp.470-479.

Schilling, K.E., Jacobson, P.J., Streeter, M.T. and Jones, C.S., 2018. Groundwater hydrology and quality in drained wetlands of the Des Moines Lobe in Iowa. Wetlands38(2), pp.247-259.

Schilling, K.E., Haines, B.J., Jones, C.S. and St Clair, M., 2018. Effectiveness of a newly reconstructed floodplain oxbow to reduce NO3-N loads from a spring flood. Journal of environmental management215, pp.385-393.

Schilling, K.E. and Dinsmore, S., 2018. Monitoring the wildlife, hydrology and water quality of drained wetlands of the Des Moines Lobe, Northern Iowa: introduction to special feature. Wetlands38(2), pp.207-210.

Schilling, K.E., Then, S.R. and Ikenberry, C.D., 2019. Water Balance Modeling of Temporary Ponding in a Drained Prairie Pothole Wetland. Environmental Modeling & Assessment24(1), pp.37-48.

Streeter, M.T., Schilling, K.E., Clair, M.S. and Demanett, Z., 2019. Soil sedimentation and quality within the roadside ditches of an agricultural watershed. Science of The Total Environment657, pp.1432-1440.

Soupir, M. L., N. L. Hoover, T. B. Moorman, J. Y. Law and B. L. Bearson (2018). "Impact of temperature and hydraulic retention time on pathogen and nutrient removal in woodchip bioreactors." Ecological Engineering 112: 153-157.

N and P Management

Brandes, E., G.S. McNunn, L.A. Schulte, D.J. Muth, A. VanLoocke, E.A. Heaton (2017). "Targeted subfield switchgrass integration could improve the farm economy, water quality, and bioenergy feedstock production."  Global Change Biology Bioenergy 10:199-212.

Brendel, C. E., M. L. Soupir, L. A. M. Long, M. J. Helmers, C. D. Ikenberry and A. L. Kaleita (2019). "Catchment-scale Phosphorus Export through Surface and Drainage Pathways." Journal of Environmental Quality 48(1): 117-126.

Cao, P. Y., C. Q. Lu and Z. Yu (2018). "Historical nitrogen fertilizer use in agricultural ecosystems of the contiguous United States during 1850-2015: application rate, timing, and fertilizer types." Earth System Science Data 10(2): 969-984.

Chen, X. W., R. M. Cruse, S. Niu and X. Y. Zhang (2019). "Effect of loading time on soil structural failure." Soil & Tillage Research 186: 87-93.

Hall, S. J., L. Reyes, W. Huang and P. M. Homyak (2018). "Wet Spots as Hotspots: Moisture Responses of Nitric and Nitrous Oxide Emissions From Poorly Drained Agricultural Soils." Journal of Geophysical Research-Biogeosciences 123(12): 3589-3602.

Jones, C.S., Drake, C.W., Hruby, C.E., Schilling, K.E. and Wolter, C.F., 2018. Livestock manure driving stream nitrate. Ambio, pp.1-11.

Jones, C.S., Schilling, K.E. and Seeman, A., 2019. Relating carbon and nitrogen transport from constructed farm drainage. Agricultural Water Management213, pp.12-23.

Kalcic, M., W. Crumpton, X. Liu, J. D'Ambrosio, A. Ward and J. Witter (2018). "Assessment of beyond-the-field nutrient management practices for agricultural crop systems with subsurface drainage." Journal of Soil and Water Conservation 73(1): 62-74.

Martinez-Feria, R. A., M. J. Castellano, R. N. Dietzel, M. J. Helmers, M. Liebman, I. Huber and S. V. Archontoulis (2018). "Linking crop- and soil-based approaches to evaluate system nitrogen-use efficiency and tradeoffs." Agriculture Ecosystems & Environment 256: 131-143.

Osterholz, W. R., M. Liebman and M. J. Castellano (2018). "Can soil nitrogen dynamics explain the yield benefit of crop diversification?" Field Crops Research 219: 33-42.

Poffenbarger, H. J., J. E. Sawyer, D. W. Barker, D. C. Olk, J. Six and M. J. Castellano (2018). "Legacy effects of long-term nitrogen fertilizer application on the fate of nitrogen fertilizer inputs in continuous maize." Agriculture Ecosystems & Environment 265: 544-555.

Rizzo, G., J. I. R. Edreira, S. V. Archontoulis, H. S. Yang and P. Grassini (2018). "Do shallow water tables contribute to high and stable maize yields in the US Corn Belt?" Global Food Security-Agriculture Policy Economics and Environment 18: 27-34.

Schilling, K. E., C. F. Wolter, T. M. Isenhart and R. C. Schultz (2015). "Tile Drainage Density Reduces Groundwater Travel Times and Compromises Riparian Buffer Effectiveness." Journal of Environmental Quality 44(6): 1754-1763.

Schilling, K.E., Kim, S.W. and Jones, C.S., 2017. Use of water quality surrogates to estimate total phosphorus concentrations in Iowa rivers. Journal of Hydrology: Regional Studies12, pp.111-121.

Schilling, K.E., Kim, S.W., Jones, C.S. and Wolter, C.F., 2017. Orthophosphorus contributions to total phosphorus concentrations and loads in Iowa agricultural watersheds. Journal of environmental quality46(4), pp.828-835.

Schilling, K. E., M. T. Streeter, T. M. Isenhart, W. J. Beck, M. D. Tomer, K. J. Cole and J. L. Kovar (2018). "Distribution and mass of groundwater orthophosphorus in an agricultural watershed." Science of the Total Environment 625: 1330-1340.

Sharpley, A., M. J. Helmers, P. Kleinman, K. King, A. Leytem and N. Nelson. 2019. “Managing crop nutrients to achieve water quality goals,” Journal of Soil and Water Conservation 74(5): 91A-101A.

Zhu, Q., M. J. Castellano and G. S. Yang (2018). "Coupling soil water processes and the nitrogen cycle across spatial scales: Potentials, bottlenecks and solutions." Earth-Science Reviews 187: 248-258.



Aller, D. M., S. V. Archontoulis, W. D. Zhang, W. Sawadgo, D. A. Laird and K. Moore (2018). "Long term biochar effects on corn yield, soil quality and profitability in the US Midwest." Field Crops Research 227: 30-40.

Amado, A.A., Schilling, K.E., Jones, C.S., Thomas, N. and Weber, L.J., 2017. Estimation of tile drainage contribution to streamflow and nutrient loads at the watershed scale based on continuously monitored data. Environmental monitoring and assessment189(9), p.426.

Arenas, A., Schilling, K., Niemeier, J. and Weber, L., 2018. Evaluating the timing and interdependence of hydrologic processes at the watershed scale based on continuously monitored data. Water10(3), p.261.

Ayers, J.R., Villarini, G., Jones, C. and Schilling, K., 2019. Changes in monthly baseflow across the US Midwest. Hydrological Processes33(5), pp.748-758.

Bates, H. and J. G. Arbuckle (2017). "Understanding Predictors of Nutrient Management Practice Diversity in Midwestern Agriculture." Journal of Extension 55(6).

Beck, W.J., Moore, P.L., Schilling, K.E., Wolter, C.F., Isenhart, T.M., Cole, K.J. and Tomer, M.D., 2019. Changes in lateral floodplain connectivity accompanying stream channel evolution: Implications for sediment and nutrient budgets. Science of The Total Environment660, pp.1015-1028.

Enloe, S. K., L. A. Schulte and J. C. Tyndall (2017). "Public-Private Partnerships Working Beyond Scale Challenges toward Water Quality Improvements from Private Lands." Environmental Management 60(4): 574-587.

Gardezi, M. and J. G. Arbuckle (2019). "Spatially Representing Vulnerability to Extreme Rain Events Using Midwestern Farmers' Objective and Perceived Attributes of Adaptive Capacity." Risk Analysis 39(1): 17-34.

Gassman, P.W., Valcu‐Lisman, A.M., Kling, C.L., Mickelson, S.K., Panagopoulos, Y., Cibin, R., Chaubey, I., Wolter, C.F. and Schilling, K.E., 2017. Assessment of bioenergy cropping scenarios for the Boone River watershed in north central Iowa, United States. JAWRA Journal of the American Water Resources Association53(6), pp.1336-1354.

Hall, S.J., L. Reyes, W. Huang and P.M. Homyak (2018). Wet Spots as Hotspots: Moisture Responses of Nitric and Nitrous Oxide Emissions From Poorly Drained Agricultural Soils. Journal of Geophysical Research: Biogeosciences 123(12): 3589-3602.

Hansen, E., Chan, K.S., Jones, C.S. and Schilling, K., 2016. Assessing the relative importance of nitrogen-retention processes in a large reservoir using time-series modeling. Journal of agricultural, biological, and environmental statistics21(1), pp.152-169.

Hay, C. H. and M. J. Helmers (2017). Evaluating Drainage Water Recycling Benefits for Crop Production in Iowa.

Iqbal, J., M. Necpalova, S. V. Archontoulis, R. P. Anex, M. Bourguignon, D. Herzmann, D. C. Mitchell, J. E. Sawyer, Q. Zhu and M. J. Castellano (2018). "Extreme weather-year sequences have nonadditive effects on environmental nitrogen losses." Global Change Biology 24(1): E303-E317.

Jones, C., Kim, S.W. and Schilling, K., 2017. Use of continuous monitoring to assess stream nitrate flux and transformation patterns. Environmental monitoring and assessment189(1), p.35.

Jones, C.S., Wang, B., Schilling, K.E. and Chan, K.S., 2017. Nitrate transport and supply limitations quantified using high-frequency stream monitoring and turning point analysis. Journal of hydrology549, pp.581-591.

Jones, C.S., Kim, S.W., Wilton, T.F., Schilling, K.E. and Davis, C.A., 2018. Nitrate uptake in an agricultural stream estimated from high-frequency, in-situ sensors. Environmental monitoring and assessment190(4), p.226.

Jones, C.S., Davis, C.A., Drake, C.W., Schilling, K.E., Debionne, S.H., Gilles, D.W., Demir, I. and Weber, L.J., 2018. Iowa statewide stream nitrate load calculated using in situ sensor network. JAWRA Journal of the American Water Resources Association54(2), pp.471-486.

Jones, C.S., Nielsen, J.K., Schilling, K.E. and Weber, L.J., 2018. Iowa stream nitrate and the Gulf of Mexico. PloS one13(4), p.e0195930.

Jones, C.S., Schilling, K.E., Simpson, I.M. and Wolter, C.F., 2018. Iowa Stream Nitrate, Discharge and Precipitation: 30-Year Perspective. Environmental management62(4), pp.709-72

Keiser, D. A., C. L. Kling and J. S. Shapiro (2019). "The low but uncertain measured benefits of US water quality policy." Proceedings of the National Academy of Sciences of the United States of America 116(12): 5262-5269.

Kling, C. L., I. Chaubey, R. Cibin, P. W. Gassman and Y. Panagopoulos (2017). "Policy Implications from Multi-scale Watershed Models of Biofuel Crop Adoption across the Corn Belt." Journal of the American Water Resources Association 53(6): 1313-1322.

Kling, C. L. and D. J. Phaneuf (2018). "How are Scope and Adding up Relevant for Benefits Transfer?" Environmental & Resource Economics 69(3): 483-502.

Mahal, N. K., M. J. Castellano and F. E. Miguez (2018). "Conservation Agriculture Practices Increase Potentially Mineralizable Nitrogen: A Meta-Analysis." Soil Science Society of America Journal 82(5): 1270-1278.

McLellan, E.L., Schilling, K.E., Wolter, C.F., Tomer, M.D., Porter, S.A., Magner, J.A., Smith, D.R. and Prokopy, L.S., 2018. Right practice, right place: A conservation planning toolbox for meeting water quality goals in the Corn Belt. Journal of Soil and Water Conservation73(2), pp.29A-34A.

Puntel, L. A., J. E. Sawyer, D. W. Barker, P. J. Thorburn, M. J. Castellano, K. J. Moore, A. VanLoocke, E. A. Heaton and S. V. Archontoulis (2018). "A Systems Modeling Approach to Forecast Corn Economic Optimum Nitrogen Rate." Frontiers in Plant Science 9.


Roesch-McNally, G. E., A. D. Basche, J. G. Arbuckle, J. C. Tyndall, F. E. Miguez, T. Bowman and R. Clay (2018). "The trouble with cover crops: Farmers' experiences with overcoming barriers to adoption." Renewable Agriculture and Food Systems 33(4): 322-333.

Rundhaug, T.J., Geimer, G.R., Drake, C.W., Amado, A.A., Bradley, A.A., Wolter, C.F. and Weber, L.J., 2018. Agricultural conservation practices in Iowa watersheds: comparing actual implementation with practice potential. Environmental monitoring and assessment190(11), p.659.

Schilling, K.E., Jones, C.S., Wolter, C.F., Liang, X., Zhang, Y.K., Seeman, A., Isenhart, T., Schnoebelen, D. and Skopec, M., 2017. Variability of nitrate-nitrogen load estimation results will make quantifying load reduction strategies difficult in Iowa. Journal of Soil and Water Conservation72(4), pp.317-325.

Schilling, K.E., Streeter, M.T., Isenhart, T.M., Beck, W.J., Tomer, M.D., Cole, K.J. and Kovar, J.L., 2018. Distribution and mass of groundwater orthophosphorus in an agricultural watershed. Science of the Total Environment625, pp.1330-1340.

Schilling, K.E., Jones, C.S., Clark, R.J., Libra, R.D., Liang, X. and Zhang, Y.K., 2019. Contrasting NO 3-N concentration patterns at two karst springs in Iowa (USA): insights on aquifer nitrogen storage and delivery. Hydrogeology Journal, pp.1-12.

Schilling, K.E., Gassman, P.W., Arenas-Amado, A., Jones, C.S. and Arnold, J., 2019. Quantifying the contribution of tile drainage to basin-scale water yield using analytical and numerical models. Science of The Total Environment657, pp.297-309.

Streeter, M.T., Schilling, K.E. and Wolter, C.F., 2018. Sediment delivery and nutrient export as indicators of soil sustainability in an Iowa agricultural watershed. Journal of soils and sediments18(4), pp.1756-1766.

Thomas, N.W., Arenas, A.A., Schilling, K.E. and Weber, L.J., 2016. Numerical investigation of the spatial scale and time dependency of tile drainage contribution to stream flow. Journal of Hydrology538, pp.651-666.

Upadhyay, P., L. O. S. Pruski, A. L. Kaleita and M. L. Soupir (2018). "Evaluation of AnnAGNPS for simulating the inundation of drained and farmed potholes in the Prairie Pothole Region of Iowa." Agricultural Water Management 204: 38-46.

Upadhyay, P., L. O. S. Pruski, A. L. Kaleita and M. L. Soupir (2019). "Effects of land management on inundation of prairie pothole wetlands in the Des Moines Lobe using AnnAGNPS." Agricultural Water Management 213: 947-956.

Vanloocke, A., T. E. Twine, C. J. Kucharik and C. J. Bernacchi (2017). "Assessing the potential to decrease the Gulf of Mexico hypoxic zone with Midwest US perennial cellulosic feedstock production." Global Change Biology Bioenergy 9(5): 858-875.

Villarini, G., Schilling, K.E. and Jones, C.S., 2016. Assessing the relation of USDA conservation expenditures to suspended sediment reductions in an Iowa watershed. Journal of environmental management180, pp.375-383.

Villarini, G., Jones, C.S. and Schilling, K.E., 2016. Soybean area and baseflow driving nitrate in Iowa’s Raccoon river. Journal of environmental quality45(6), pp.1949-1959.

Wilson, C.G., Schilling, K.E., et al. 2018. The Intensively Managed Landscape Critical Zone Observatory: A scientific testbed for understanding critical zone processes in agroecosystems. Vadose Zone Journal17(1).