The document discusses the effect of different inoculation methods in legume production. It finds that inoculating legumes with Rhizobium bacteria can significantly increase yields, ranging from 10-100% depending on soil conditions, by enabling atmospheric nitrogen fixation. Specifically, combining Rhizobium inoculation with phosphorus and nitrogen applications resulted in the highest soybean grain yields, number of nodules, and profits. The most common inoculation methods discussed are seed coating, dusting and slurry, with seed coating found to be the easiest and most popular approach. Inoculation also improves soil fertility for future crops by adding nitrogen.