Authors: Bear, F. E. --- Jones, H. A. --- Brown, B.-E. --- Judkins, W. P. --- Camp, A. F. --- et al. Krantz, B. A. --- Chapman, H. D. --- McMurtrey, J. E. --- Cooper, H. P. --- Nelson, W. L. --- Davidson, O. W. --- Parker, E. R. --- Donald, L. --- Purvis, E. R. --- Hoffer, G. N. --- Scarseth, G. D. --- Houghland, G. V. C. --- Skinner, J. J. --- Volk, N. J.
Year: 1949 Publisher: Washington : Washington : The American Society of Agronomy ; The National Fertilizer Association,