Issues regarding use of genetically enhanced corn hybrids
Field diagnosis of growth and development problems
Design and analysis of on-farm research to test and confirm usefulness of
management practices
Crop rotation effects
Current Research Projects & Demonstrations
Measuring the effect of crop rotation on response of corn to N fertilizer
Cropping sequence and practices as they affect crop yield and yield stability
Planting date and plant population effects on corn yield
Simulated hail effects on corn
Micronutrient and seed inoculant effects on corn and soybean
Variety testing
Nitrogen and hybrid interactions
New N rate guidelines and on-farm corn N rate trials
Weed management in corn and soybean
Current Issues in Crop Production
Effects of crop rotation on yield and yield stability, as rotations shift
to respond to changing demand
Acceptability and economic value to producers of genetically enhanced crops
Economic and environmental optimization of inputs to crop production
Planting date and seeding rate optimization in corn and soybean
The interaction of crop production techniques with pest management
Designing and implementing effective on-farm, adaptive research
Value to producers of precision farming techniques
Understanding crop growth and development, as affected by crop management
and stress
Refereed 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 (Xanthiumstrumarium 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
(Xanthiumpensylvanicum) 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 (Xanthiumpensylvanicum)
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.
