Department of Crop Sciences
Samuel Wortman
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Samuel Wortman

Assistant Professor
1011 Plant Sciences Laboratory
1201 S. Dorner Drive
Urbana, IL 61801
(217) 300-0232


Ph.D. Agronomy (Applied Ecology) University of Nebraska - Lincoln 2012
M.S. Agronomy (Crop Production) University of Nebraska - Lincoln 2009
B.A. Biology and Environmental Studies University of St. Thomas 2007

Research Areas

Space-Intensive Urban and Peri-Urban Agricultural Production
Plant Ecophysiology
Ecological Pest Management
Cover Crops
Organic and Sustainable Farming


Assistant Professor, Urban Food Production, Department of Crop Sciences, University of Illinois (2012 - present)

Journal Articles

Wortman, S. E., J. J. Schmidt, and J. L. Lindquist. 2014. Weed suppressive potential of sudangrass is driven by interactions of root exudates and decomposing shoot residue. Crop Management. Accepted.
Wagstaff, R., and S. E. Wortman. 2014. Crop Physiological Response across the Chicago Metropolitan Region: Developing Recommendations for Urban and Peri-Urban Farmers in the North Central US. Renewable Agriculture and Food Systems (Special Issue on Innovations and Trends in Sustainable Urban Agriculture). Accepted.
Wortman, S. E. 2014. Integrating weed and vegetable crop management with multifunctional air-propelled abrasive grits. Weed Technology. Accepted.
Wortman, S. E. and S. T. Lovell. 2013. Environmental challenges threatening the growth of urban agriculture in the United States. Journal of Environmental Quality 42:1283-1294.
Wortman, S. E., R. A. Drijber, C. A. Francis, and J. L. Lindquist. 2013. Arable weeds, cover crops, and tillage drive soil microbial community composition in organic cropping systems. Applied Soil Ecology 72:232-241.
Wortman, S. E., C. A. Francis, T. D. Galusha, C. Hoagland, J. Van Wart, P. S. Baenziger, T. Hoegemeyer, and M. Johnson. 2013. Evaluating Cultivars for Organic Farming: Maize, Soybean, and Wheat Genotype by System Interactions in Eastern Nebraska. Agroecology and Sustainable Food Systems 37:915-932.
Schutte, B. J., S. E. Wortman, J. L. Lindquist and A. S. Davis. 2013. Maternal Environment Effects on Phenolic Defenses in Abutilon theophrasti Seeds. American Journal of Plant Sciences 4:1127-1133.
Wortman, S. E., C. A. Francis, M. A. Bernards, E. E. Blankenship, and J. L. Lindquist. 2013. Mechanical termination of diverse cover crop mixtures for improved weed suppression in organic cropping systems. Weed Science 61:162-170.
Wortman, S. E., A. S. Davis, B. J. Schutte, J. L. Lindquist, J. Cardina, J. Felix, C. L. Sprague, J. A. Dille, A.H.M. Ramirez, G. Reicks, and S. A. Clay. 2012. Local conditions, not regional gradients, drive demographic variation of Ambrosia trifida and Helianthus annuus across northern US maize belt. Weed Science 60:440-450.
Wortman, S. E., C. A. Francis, M. Bernards, R. Drijber, and J. L. Lindquist. 2012. Optimizing cover crop benefits with diverse mixtures and an alternative termination method. Agronomy Journal 104:1425-1435.
Wortman, S. E., C. A. Francis, and J. L. Lindquist. 2012. Cover Crop Mixtures for the Western Corn Belt: Opportunities for Increased Productivity and Stability. Agronomy Journal 104:699-705.
Wortman, S. E., T. Galusha, S. C. Mason, and C. A. Francis. 2012. Soil Fertility and Crop Yields in Long-Term Organic and Conventional Cropping Systems in Eastern Nebraska. Renewable Agriculture and Food Systems 27:200-216.
Wortman, S. E., A. S. Davis, B. Schutte., and J. L. Lindquist. 2011. Integrating Management of Soil Nitrogen and Weeds. Weed Science 59:162-170.
Lindquist, J. L., S. E. Wortman, and C. A. Francis. 2011. Adding Value to Graduate Education: the Comprehensive Examination. NACTA Journal 55:106-107.
Wortman, S. E., J. L. Lindquist, M. Haar, and C. A. Francis. 2010. Increased Weed Diversity, Density and Aboveground Biomass in Long-Term Organic Crop Rotations. Renewable Agriculture and Food Systems 25:281-295.