ditto what Farm Hunter said.

Clover cannot store/use Nitrogen from the air unless the correct bacteria (innoculant) is in the soil. Clover will grow well without an innoculant, clovers can and will use nitrogen in the soil just like any other green plant. The innoculant (bacteria) only function is to give the clover the ability to store (afix) Nitrogen, from the air, to the root noduals. Red Clovers, white clovers, birdsfoot trefoil, alfalfa, each use a different innoculant bacteria to afix nitrogen. The innoculant bacteria is easily killed buy heat and sunlight.

For a foodplot, innoculation may not make any difference. But, a properly innoculated clover plot, maintained for 3-4 years could store 100-150 lbs of Nitrogen in the soil. This could be a huge advantage in labor and $ savings when the field is tilled and replanted with corn, oats, wheat, ect. in reduced need for Nitrogen applications.