Assistant Professor. Present address: Dept. of Agriculture, Lincoln Univ., Jefferson City, MO 65101. (Former Graduate Assistant.)
Received for publication 5 Aug. 1983. Paper number 13,509 of the Scientific Journal Series, Univ. of Minnesota Agricultural Experiment Station. Research supported in part by a grant from the International Minerals and Chemical Corp., Terre Haute, Ind. The authors wish to acknowledge the financial support from the International Minerals and Chemicals Corporation, Terre Haute, Ind., and thank the Nitragin Company, Milwaukee, Wis., for providing the inoculum used in this study. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.