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. 2015. Air-propelled abrasive grits reduce weed abundance and increase yields in organic vegetable production. Crop Protection 77:157-162.
Wortman, S. E. 2015. Crop physiological response to nutrient solution electrical conductivity and pH in an ebb-and-flow hydroponic system. Scientia Horticulturae 194:34-42. 
Wortman, S. E., I. Kadoma, and M. D. Crandall. 2015. Assessing the potential for spunbond, nonwoven biodegradable fabric as mulches for tomato and pepper crops. Scientia Horticulturae 193:209-217.  
Wortman, S. E., and J. O. Dawson. 2015. Nitrogenase activity and nodule biomass of cowpea (Vigna unguiculata L. Walp.) decrease in cover crop mixtures. Communications in Soil Science and Plant Analysis 46:1443-1457.
Wagstaff, R., and S. E. Wortman. 2015. 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 30:8-14. (Special Issue on Innovations and Trends in Sustainable Urban Agriculture)
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 13:DOI 10.2134/CM-2013-0037-RS.
Wortman, S. E. 2014. Integrating weed and vegetable crop management with multifunctional air-propelled abrasive grits. Weed Technology 28:243-252.
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.