1. FAO FAOSTAT; 2018 [cited 28 February 2018]. [Internet] Available at http://www.fao.org/faostat/en/#data/QC.
2. SoyStats A reference guide to important soybean facts and figures. American Soybean Association. 2017 [cited 28 February] [Internet] Available from: http://soystats.com/.
3. Soybean yield potential—a genetic and physiological perspective;JE Specht;Crop Sci,1999
4. Soybeans: improvement, production, and uses agronomy monograph 16;LC Purcell,2004
5. Root elongation, water stress, and mechanical impedance: a review of limiting stresses and beneficial root tip traits;AG Bengough;J Exp Bot,2011