General Crop Production Extension:
Boomsma, C.R., and Tony J. Vyn. 2007. Plant population influences on maize physiological responses to nitrogen application. Proceedings of the North Central Extension-Industry Soil Fertility Conference held Nov. 14-15, 2007 in Des Moines, IA. Proceedings Vol. 23:136-144.
Yin, X., and T.J. Vyn. 2005. Critical leaf potassium is higher in no-till soybean. Better Crops 89 (2):1-5.
Yin, X., and T.J. Vyn. 2005. High soybean yield can mean higher concentrations of isoflavones. Better Crops 89 (4):13-15.
Rethinking Rotations : Less Soybean and More Corn in the Corn-Belt?
Vyn, Tony J. 2004. Pages 7-9 in Pest and Crop Newsletter No. 26 (Oct. 22, 2004), Purdue University.“Don’t take out poor no-till performance on your soil” Successful Farming Agriculture On-line (March 16, 2004) available at http://www.agriculture.com/default.sph/AgNews.class?FNC=sideBarMore__ANewsindex_html___51436
Management Considerations for Relay Intercropping: II.
Soybean, S.M. McCoy, T.J. Vyn, A.M. Kline, T.D. West, E.P. Christmas
(April 2003)
Comments on Crop Stress
Avoidance (tillage, fertility, etc.)
Based on Interview
Jan. 06, 2003
Purdue Experts: Harvest Wetter to Avoid More Yield Loss
Crop Response to Moisture Stress (July 24, 2002)
Rules for Planting Corn in a Wet Spring (Ag Answers, May 23, 2002)
Nitrogen Management for Corn in a Wet Spring (Ag Answers, May 23, 2002)
Nitrogen Recommendations for Corn in a Wet Spring (AgWeb.com, May 23, 2002)
Sidedressing Nitrogen in a Wet Spring (Agriculture
online News, May 23, 2002)