cultivation experiments ( mitscherlich-vessels , quartz sand , 15n-labelled soil , 15n-fertilizer ) showed , that various strains of rhizobium lupini ( white and yellow lupines ) and of rhizobium leguminosarum ( field beans and peas ) induced a different n2-fixation of the inoculated plants , the most effective rhizobium strains being 367a , cz , t3 , 271 ( rh . lupini ) , and azotogen ( rh , leguminosarum ) .
C0034387
quartz
C0037098
sand