Deans, C. A., Sword, G. A., Lenhart, P. A., Burkness, E., Hutchison, W. D., Behmer, S. T. Quantifying Plant Soluble Protein and Digestible Carbohydrate Content, Using Corn (Zea mays) As an Exemplar. J. Vis. Exp. (138), e58164, doi:10.3791/58164 (2018).