Yes, but some bagged inoculants will have a couple different bacterias blended together for broad use. The last inoculant I purchased was Nitragin brand, it had two bacterias (Rhizobium meliloti, and Rizobium leguminosarum biovar trifolii). It waslabled for alfalfa, sweetclover, red, white, alsike, and ladino clovers.

Soybeans would use a different bacteria, Kura clover yet another different inoculant bacteria. A 6.6 ounce bag cost about $6, and will do about 80 lbs of clover seed.

Inoculant bacteria is not required to grow healthy clover, alfalfa, or soybeans! It only insures these legumes will have the ability to store Nitrogen from the air, in root nodules, for later use, or for next years crop. These legumes will use, and benefit from some applied Nitrogen, just like every other green plant. But in turn, Nitrogen will also benefit weeds and grasses that might be competeing with the legumes for water, nutrients, and space.

For farmers, inoculating legume seed is a cheap way to insure banking an extra 50 to 100 lbs of Nitrogen, in the soil, for next years crop, and saving on his future fertilizer bill.