Department of Crop Sciences
Emerson Nafziger
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Emerson Nafziger

Research Education Center Coordinator
W-301 Turner Hall
1102 S. Goodwin
Urbana, IL 61801
(217) 333-9658

Research Areas

Weed management in corn and soybeans
New N rate guidelines and on-farm corn N rate trials
Nitrogen and hybrid interactions
Variety testing
Micronutrient and seed inoculant effects on corn and soybeans
Simulated hail effects on corn
Planting date and plant population effects on corn yield
Cropping sequence and practices as they affect crop yield and yield stability
Measuring the effect of crop rotation on response of corn to N fertilizer

Journal Articles

Nordby, D.E., D.L. Alderks, and E.D. Nafziger. 2008. Competitiveness with weeds of soybean cultivars with different maturity and canopy width characteristics. Weed Technol. 22:in press
Adee, E.A., E.D. Nafziger, and L.E. Paul. 2007. Optimizing plant population and nitrogen rate for high-oil corn. Online. Crop Management in press
Coulter, J.A. and E.D. Nafziger. 2007. Planting date and glyphosate timing on soybean. Weed Technol. 21:359-366.
Sawyer, J., E. Nafziger, G. Randall, L. Bundy, G. Rehm, and B. Joern. 2006. Concepts and rationale for regional nitrogen rate guidelines for corn (PM 2015), Iowa State University Extension, Ames, Iowa.
Nafziger, E. D. 2006. Inter- and intraplant competition in corn. Online. Crop Management doi:10.1094/CM-2006-0227-05-RV.
Adee, E. A., Paul, L. E., Nafziger, E. D., and Bollero, G. 2005. Yield loss of corn hybrids to incremental defoliation. Online. Crop Management doi:10.1094/CM-2005-0427-01-RS.
Daverede, I.C., A.N. Kravchenko, R.G. Hoeft, E.D. Nafziger, D.G. Bullock, J.J. Warren, and L.C. Gonzini. 2004. Phosphorus runoff from incorporated and surface-applied liquid swine manure and phosphorus fertilizer. J. Environ. Qual. 33:1535-1544.
Thomison, P. R., and Nafziger, E. D. 2003. Defoliation affects grain yield, protein, and oil of TopCross high-oil corn. Online. Crop Management doi:10.1094/CM-2003-1027-01-RS.
Daverede, I.C., A.N. Kravchenko, R.G. Hoeft, E.D. Nafziger, D.G. Bullock, J.J. Warren, and L.C. Gonzini. 2003. Phosphorus runoff: effect of tillage and soil phosphorus levels. J. Environ. Qual. 32:1436-1444.
Boote, K.D., J. W. Jones, W. D. Batchelor, E. D. Nafziger, and O. Myers. 2003. Genetic coefficients in the CROPGRO–soybean model: links to field performance and genomics. Agron. J. 95: 32-51.
Majchrzak, R.N., K.R. Olson, G Bollero, and E.D. Nafziger. 2001. Using soil properties to predict wheat yields on Illinois soils. Soil Sci.166: 267-280.
Graeber, J.V., E.D. Nafziger, and D.W. Mies. 1999. Evaluation of transgenic, Bt-containing corn hybrids. J. Prod. Agric. 12:659-663.
Bullock, D.G., D.S. Bullock, E.D. Nafziger, T. Doerge, S. Paszkiewicz, P. Carter, and T.A. Peterson. 1998. Does variable rate seeding of corn pay?. Agron. J. 90:830-836.
Ritchie, K.B., R.G. Hoeft, E.D. Nafziger, L.C. Gonzini, and J.J. Warren. 1997. Starters perform more consistently than seed-placed fertilizers. Fluid Journal 4:18-21.
Nafziger, E.D. 1996. Effects of missing and two-plant hills on corn grain yield. J. Prod. Agr. 9:238-240.
Nafziger, E.D. 1994. Corn planting date and plant population. J. Prod. Agr. 7:59-62.
Mian, M.A.R. and E.D. Nafziger. 1994. Seed size and water potential effects on germination and seedling growth of winter wheat. Crop Sci. 34:169-171.
Mian, M.A.R., E.D. Nafziger, F.L. Kolb, and R.H. Teyker. 1994. Root size and distribution of field-grown wheat genotypes. Crop Sci. 34:810-812.
Thompson, S., R.J. Hauser, H.D. Guither, and E.D. Nafziger. 1993. Evaluating alternative crops from a marketing perspective: the case of canola. J. Prod. Agric. 6:575-584.
Mian, M.A.R., E.D. Nafziger, F.L. Kolb, and R.H. Teyker. 1993. Root growth of wheat genotypes in hydroponic culture and in the greenhouse under different soil moisture regimes. Crop Sci. 33:283-286.
Nafziger, E.D. 1992. Seed size effects on yields of two corn hybrids. J. Prod. Agric. 5:538-540.
Mian, A.R. and E.D. Nafziger. 1992. Seed size effects on emergence, head number, and grain yield in winter wheat. J. Prod. Agric. 5:265-268.
Nafziger, E.D., P.R. Carter, and E.E. Graham. 1991. Response of corn to uneven emergence. Crop Sci. 31:811-815.
Bahadar, K.B. and E.D. Nafziger. 1990. Common cocklebur and velvetleaf interference with soybean grown at different densities and planting patterns. Agron. J. 82:531-534.
Regnier, E.E., E.W. Stoller, and E.D. Nafziger. 1989. Common cocklebur (Xanthium strumarium L.) root and shoot interference in soybean (Glycine max L.). Weed Sci. 37:308-313.
Willmot, D.B., G.E. Pepper, and E.D. Nafziger. 1989. Random stand deficiency and replanting delay effects on soybean yield, yield components, canopy, and morphological responses. Agron J. 81:425-430.
Stoller, E.W., S.K. Harrison, L.M. Wax, E.E. Regnier, and E.D. Nafziger. 1987. Weed interference in soybeans. Rev. Weed Sci. 3:155-181.
Nafziger, E.D., L.M. Wax, and C.M. Brown. 1985. Response of five winter wheat cultivars to growth regulators and increased N. Crop Sci. 26:767‑770.
Nafziger, E.D., R.L. Mulvaney, D.L. Mulvaney, and L.E. Paul. 1984. Effect of previous crop on the response of corn to fertilizer nitrogen. J. Fert. Issues. 1(4):136‑138.
Nafziger, E.D., J.M. Widholm, H.C. Steinrucken, and J.L. Killmer. 1984. Selection and characterization of a carrot cell line tolerant to glyphosate. Plant Physiol. 76:571-574.
Nafziger, E.D. 1984. The use of demonstration plots as extension tools. J. Agron. Ed. 13:47-49.
Nafziger E.D., and F.W. Slife. 1983. Physiological response of common cocklebur (Xanthium pensylvanicum) to glyphosate. Weed Sci. 31:874-878.
Nafziger, E.D., J.M. Widholm, and F.W. Slife. 1983. The effects of aspartate and other compounds on glyphosate uptake and growth inhibition in cultured carrot cells. Plant Physiol. 71:623-626.
Foley, M.E., E.D. Nafziger, L.M. Wax, and F.W. Slife. 1983. Effect of glyphosate on protein and nucleic acid synthesis and ATP levels in common cocklebur (Xanthium pensylvanicum) root tissue. Weed Science 31:76-80.
Nafziger, E.D., and H.R. Koller. 1976. Influence of leaf starch concentration of CO2 assimilation in soybean. Plant Physiol. 57:560-563.