Northern Research and Demonstration Farm
The soybean, being a legume, has the capacity to form root nodules and to fix nitrogen from the air. Rhizobia bacteria must be present for the soybeans to fix nitrogen. Because of the development of new strains of rhizobia and the new formulations of inoculants, a study was conducted to test whether a seed-applied inoculant, Sow-fast, would increase yield.
Iowa State University
Rueber, David, "Effect of Inoculation of Soybean Seed on Yield" (2003). Iowa State Research Farm Progress Reports. 1521.