Corn and soybean meal samples were obtained from 16 different locations in Illinois in each of the years 1965 and 1966. Analyses were made on each sample for dry matter, gross energy, protein, 18 amino acids and 14 minerals. A correlation analysis of protein and individual amino acids for corn and soybean meal separately indicated that within the narrow range of protein values for each feedstuff the correlations were low. Mineral values tended to agree with those reported in the literature except for phosphorus in corn and sodium in both corn and soybean meal which are considerably less than values reported by the National Research Council.