Soybean inoculation studies
Erdman, L.W., Wilkins, F.S.
Soybean inoculation studies - Iowa 1928 - 56 p. - Soybean Iowa Agricultural Experiment Station. Research Bulletin No. 114 .
Soybean inoculation studies - Iowa 1928 - 56 p. - Soybean Iowa Agricultural Experiment Station. Research Bulletin No. 114 .