Armstrong Research and Demonstration Farm
Often there is yellowing of soybeans following glyphosate applications that have been attributed by some as manganese or zinc deficiency. There have been varied reports of impacts of this ‘yellow flash’ on soybean yields. Thistrial was conducted to investigate such claims.
Iowa State University
Licht, Mark A.; Koopman, Zachary A,; and Berns, Kent R., "Glyphosate, Manganese, and Zinc Soybean Trial" (2013). Iowa State Research Farm Progress Reports. 1882.