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7161. Vandecaveye, S.C. and W.H. Fuller. 1941. Studies of different cultures of Rhizobium leguminosarum and of gypsum and straw for seed pea production.. Iowa St. College Journal of Sci. 15(4):415-423.
Tested 7 cultures of Rhizobium for nodulation and yield of Alaska seed peas. Also did a pot study with wheat straw and gypsum amendments. The field soil had never had peas before, but contained sufficient Rhizobium to inoculate peas. Seed inoculation tended to increase yields, but no culture was a sufficiently good N fixer to insure vigorous growth on soils low in available N. Soil amendments did not affect nodulation or growth. Yield differences were primarily due to variation in soil productivity.