The growth rates of two strains of Rhizobium meliloti were measured when the organisms were grown in a nitrogen-free medium and in a medium containing nitrate nitrogen. The strains used differed widely in their ability to aid the host plant in symbiotic nitrogen fixation. They also differed somewhat in cultural characteristics.
Proceedings of the Iowa Academy of Science
©1931 Iowa Academy of Science, Inc.
Walker, R.H. and Anderson, Dean A.
"Comparative Growth Rates of Different Strains of Rhizobium meliloti,"
Proceedings of the Iowa Academy of Science, 38(1), 333-334.
Available at: https://scholarworks.uni.edu/pias/vol38/iss1/114