Publications

M. J. Helmers, Zhou, X., Asbjornsen, H., and Kolka, R., “Water quality benefits of perennial filter strips in row-cropped watersheds”, 2011.

H. Asbjornsen, Mora, G., and Helmers, M. J., “Variation in water uptake dynamics among contrasting agricultural and native plant communities in the Midwestern US”, Agriculture, ecosystems & environment, vol. 121, pp. 343-356, 2007.

M. Liebman, Helmers, M. J., Schulte, L. A., and Chase, C. A., “Using biodiversity to link agricultural productivity with environmental quality: Results from three field experiments in Iowa”, Renewable Agriculture and Food Systems, vol. 28, pp. 115-128, 2013.

H. Asbjornsen, Hernandez-Santana, V., Liebman, M., Bayala, J., Chen, J., Helmers, M., Ong, C. K., and Schulte, L. A., “Targeting perennial vegetation in agricultural landscapes for enhancing ecosystem services”, Renewable Agriculture and Food Systems, vol. 29, pp. 101-125, 2014.

L. A. Schulte, Asbjornsen, H., Atwell, R. C., Hart, C., Helmers, M., Isenhart, T., Kolka, R., Liebman, M., Neal, J., O'Neal, M., Schultz, R., Secchi, S., Thompson, J., Tomer, M., and Tyndall, J., “Targeted conservation approaches for improving water quality: Multiple benefits for expanded opportunities”, Iowa State University, Ames, Iowa, PMR 1002, 2008. Schulte et al. 2008 ISUExt.PMR1002.pdf (2.12 MB)

B. Brittenham and Helmers, M., “Summary of shallow groundwater nitrate at Neal Smith National Wildlife Refuge”, 2016. Brittenham & Helmers 2016 STRIPS1 Shallow ground water results.pdf (81.55 KB)

M. J. Helmers, Zhou, X., Asbjornsen, H., Kolka, R., Tomer, M. D., and Cruse, R. M., “Sediment removal by prairie filter strips in row-cropped ephemeral watersheds”, Journal of environmental quality, vol. 41, pp. 1531-1539, 2012.

H. Asbjornsen, Shepherd, G., Helmers, M., and Mora, G., “Seasonal patterns in depth of water uptake under contrasting annual and perennial systems in the Corn Belt Region of the Midwestern US”, Plant and Soil, vol. 308, pp. 69-92, 2008.

J. Gutierrez-Lopez, Asbjornsen, H., Helmers, M., and Isenhart, T., “Regulation of soil moisture dynamics in agricultural fields using strips of native prairie vegetation”, Geoderma, vol. 226, pp. 238-249, 2014.

E. Heaton, Moore, L. Schulte, Helmers, M., Liebman, M., and Milster, F., “Producing food, feed and energy: How can agriculture do it all?”, 25th Annual Integrated Crop Management Conference. Iowa State University, Ames, Iowa, 2013. producing_food_feed_and_energy_how_can_agriculture_do_it_all_.pdf (2.95 MB)

L. A. Schulte, Niemi, J., Helmers, M. J., Liebman, M., Arbuckle, J. G., James, D. E., Kolka, R. K., O'Neal, M. E., Tomer, M. D., Tyndall, J. C., Asbjornsen, H., Drobney, P., Neal, J., Van Ryswyk, G., and Witte, C., “Prairie strips improve biodiversity and the delivery of multiple ecosystem services from corn–soybean croplands”, PNAS, 2017.

N. Grudens-Schuck, Helmers, M. J., Youngquist, T. D., and Johnson, M. S., “Prairie strips for sediment and nutrient control and biodiversity”, Journal of Extension, vol. 55, no. 1, 2017.

L. A. Schulte, MacDonald, A. L., Niemi, J. B., and Helmers, M. J., “Prairie strips as a mechanism to promote land sharing by birds in industrial agricultural landscapes”, Agriculture, Ecosystems, and Environment, vol. http://dx.doi.org/10.1016/j.agee.2016.01.007, 2016.

J. W. Doudna, O'Neal, M. E., Tyndall, J. C., and Helmers, M. J., “Perspectives of extension agents and farmers toward multifunctional agriculture in the United States Corn Belt”, Journal of Extension, vol. 53, no. 6, 2015.

X. Zhou, Helmers, M. J., Asbjornsen, H., Kolka, R., and Tomer, M. D., “Perennial filter strips reduce nitrate levels in soil and shallow groundwater after grassland-to-cropland conversion”, Journal of environmental quality, vol. 39, pp. 2006-2015, 2010.

B. Chen, Krajewski, W. F., Zhou, X., and Helmers, M. J., “Organized variability of surface runoff responses across neighboring hillslopes in Iowa”, Journal of Hydrology, vol. 523, pp. 1-13, 2015.

X. Zhou, Helmers, M. J., Asbjornsen, H., Kolka, R., Tomer, M. D., and Cruse, R. M., “Nutrient removal by prairie filter strips in agricultural landscapes”, Journal of Soil and Water Conservation, vol. 69, pp. 54-64, 2014.

M. J. Helmers, Grudens-Shuck, N., and Youngquist, T. D., “Novel Use of Conceptual Change Framework Improves Video on Challenging Science Topic”, Journal of Extension, vol. 57, no. 1IAW2, 2019. novel_use_of_conceptual_change_framework_improves_video_on_challenging_science_topic.pdf (558.77 KB)

M. Perez-Suarez, Castellano, M. J., Kolka, R., Asbjornsen, H., and Helmers, M., “Nitrogen and carbon dynamics in prairie vegetation strips across topographical gradients in mixed Central Iowa agroecosystems”, Agriculture, Ecosystems, and Environment, vol. 188, p. 11, 2014.

M. L. Hladik, Bradbury, S., Schulte, L. A., Helmers, M., Witte, C., Kolpin, D. W., Garrett, J. D., and Harris, M., “Neonicotinoid insecticide removal by prairie strips in row-cropped watersheds with historical seed coating use”, Agriculture, Ecosystems, and Environment, vol. 241, pp. 160-167, 2017.

V. Hernandez-Santana, Zhou, X., Helmers, M. J., Asbjornsen, H., Kolka, R., and Tomer, M., “Native prairie filter strips reduce runoff from hillslopes under annual row-crop systems in Iowa, USA”, Journal of HydrologyJournal of Hydrology, vol. 477, pp. 94-103, 2013.

M. Perez-Bidegain, Helmers, M. J., and Cruse, R., “Modeling phosphorus transport in an agricultural watershed using the WEPP model”, Journal of Environmental Quality, vol. 39, pp. 2121-2129, 2010.

M. Liebman, Helmers, M. J., and Schulte, L. A., “Integrating conservation with biofuel feedstock production”, Managing agricultural landscapes for environmental quality II: achieving more effective conservation. Soil and Water Conservation Society of America, Ames, IA, pp. 131-142, 2011.

J. A. Stephenson, Liebman, M., Niemi, J., Cruse, R., Tyndall, J., Witte, C. - P., James, D., and Helmers, M., “The Influence of Prairie Strips Sown in Midwestern Corn and Soybean Fields on Sediment Discharge Throughout the Year”, Journal of Soil and Water Conservation, vol. 79, no. 2, 2024. 87.full_.pdf (688.49 KB)

E. J. Henning, Kolka, R. K., and Helmers, M. J., “Infiltration within Native Prairie Vegetative Strips Embedded in Row Crop Fields across Iowa”, Journal of Soil and Water Conservation, vol. 79, no. 1, 2024. 43.full_.pdf (587.84 KB)

D. R. Lockett, Zhou, X., and Helmers, M. J., “Impacts of Incorporating Prairie Vegetation within Row Crop Production on Soil Hydraulic Properties”, 2011 Louisville, Kentucky, August 7-10, 2011. American Society of Agricultural and Biological Engineers, p. 1, 2011.

R. Cox, O'neal, M., Hessel, R., Schulte, L. A., and Helmers, M., “The impact of prairie strips on aphidophagous predator abundance and soybean aphid predation in agricultural catchments”, Environmental Entomology, vol. 43, pp. 1185-1197, 2014.

G. Arbuckle J Jr, Helmers, M. J., Liebman, M. Z., and Schulte, L. A., “From vulnerability to resiliency: Iowa agriculture in the age of biorenewables”, 2008.

J. C. Tyndall, Schulte, L. A., Liebman, M., and Helmers, M., “Field-Level Financial Assessment of Contour Prairie Strips for Enhancement of Environmental Quality”, Environmental Management, vol. 52, pp. 736-747, 2013.

T. E. Smith, Kolka, R. K., Zhou, X., Helmers, M. J., Cruse, R. M., and Tomer, M. D., “Effects of native perennial vegetation buffer strips on dissolved organic carbon in surface runoff from an agricultural landscape”, Biogeochemistry, vol. 120, pp. 121-132, 2014.

J. Iqbal, Parkin, T. B., Helmers, M. J., Zhou, X., and Castellano, M. J., “Denitrification and Nitrous Oxide Emissions in Annual Croplands, Perennial Grass Buffers, and Restored Perennial Grasslands”, Soil Science Society of America Journal, vol. 79, 2015. 2014 Iqbal et al. SSSAJ.pdf (799.51 KB)

J. Tyndall, Moore, L. Schulte, Liebman, M., and Helmers, M., “The Cost of Prairie Strips”, 2013. . the_cost_of_prairie_conservation_strips.pdf (1.36 MB)

C. Dutter, Damiano, L. A., Niemi, J., Miller, B. A., Schulte, L. A., Liebman, L., Helmers, M., Cruse, R., and McDaniel, M. D., “Contour prairie strips affect adjacent soil but have only slight effects on crops”, Field Crop Research, vol. 269, 2023.

D. C. Mitchell, Zhou, X., Parkin, T. B., Helmers, M. J., and Castellano, M. J., “Comparing Nitrate Sink Strength in Perennial Filter Strips at Toeslopes of Cropland Watersheds”, Journal of Environmental Quality, 2014. 2014 Mitchell et al. JEQ.pdf (878.38 KB)

J. Doudna, Helmers, M., and O'Neal, M., “Can conservation complement agriculture?”, 2011.

A. M. Roberts, Helmers, M. J., and Fillery, I. R. P., “The adoptability of perennial-based farming systems for hydrologic and salinity control in dryland farming systems in Australia and the United States of America”, Crop and Pasture Science, vol. 60, pp. 83-99, 2009.