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A contribution to the investigation of the assimilation of free atmospheric nitrogen by white and black mustard /
By: Lotsy, Johannes Paulus, - United States.
Publication info: Washington :U.S. G.P.O.,1894.
Contributed by: U.S. Department of Agriculture, National Agricultural Library
Subjects: Assimilation Mustard Nitrogen Plants
By: British Columbia.
Publication info: Victoria, B.C. :R. Wolfdenden,1903.
Contributed by: Canadiana.org (archive.org)
Subjects: Control Mustard Weeds