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(1975) Iowa, Where the Tall Corn Grows: (and everything else!) 1975. Iowa State University Extension
(1983) Sulfur--an essential nutrient, 1983. Iowa State University Extension
(1986) How a corn plant develops, 1986. Iowa State University Extension
(1986) Corn Rootworm Management, June 1986. Iowa State University
(1989) European Corn Borer: Development and Management, 1989. Iowa State University Extension
(2006) Concepts and Rationale for Regional Nitrogen Rate Guidelines for Corn, April 2006. Iowa State University Extension
(2006) The Long-Run Impact of Corn-Based Ethanol on the Grain, Oilseed, and Livestock Sectors: A Preliminary Assessment, November 2006. Iowa State University
(2007) Emerging Biofuels: Outlook of Effects on U.S. Grain, Oilseed, and Livestock Markets, 2007. Iowa State University
(2007) Impact of High Crop Prices on Environmental Quality: A Case of Iowa and the Conservation Reserve Program, 2007. Iowa State University
(2007) Watching Corn Grow: A Hedonic Study of the Iowa Landscape, april 2007. Iowa State University