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Dr. Peter H. Graham
439 Borlaug Hall
1991 Upper Buford Circle
St Paul, MN 55406

The Rhizobium Research Laboratory Prairie, Becker, MN. The prairie wass seeded and inoculated in 1999, and is now a well established tall-grass prairie in which essentially all of the N in the system comes from N2 fixation by component legumes.

Why study nodulation and nitrogen fixation

Origins of our research interests

Research involving crop legumes

• Improving the ability for nodulation and nitrogen fixation of common beans and soybean

• Edaphic factors affecting nodulation and nitrogen fixation in Phaseolus vulgaris

• Coevolution of Phaseolus vulgaris and its rhizobia

• Rhizobium/Bradyrhizobium strain selection and testing for beans and soybeans

Research involving prairie and pasture legumes

• Nodulation and nitrogen fixation by prairie legumes in roadside settings and restoration sites

• Effects of prairie fragmentation on above and below ground diversity and nitrogen fixation

Publications