Ag Engineering/Agronomy, Central Iowa and BioCentury Research Farms
Often there is yellowing of soybeans following glyphosate applications that has been attributed by some as manganese or zinc deficiency. There have been varied reports of impacts of this ‘yellow flash’ on soybean yields. The trial was conducted to investigate such claims.
Iowa State University
Licht, Mark A. and Berns, Kent R., "Glyphosate, Manganese, and Zinc Soybean Trial" (2012). Iowa State Research Farm Progress Reports. 21.