jdoc, One comparision is the number of rhizobia per gram. Here is how they stack up: Nitrastik-s: 250 million per gram ABM non-sterile humus: 1 billion per gram ABM Sterile peat: 3 billion per gram Graph-Ex: 5 billion per gram Celltech: 2 billion per mL ABI Liquid: 2 billion per mL The other big difference is in the strains of rhizobia. Celltech and Nitrastik-S use two strains. The ABM products use 3 strains. Each strain has it's strengths and will work in certain areas and certain management practices. Each farmer needs to evaluate which strains (or combination of strains) will work on his farm. | 
Question on Culler's beans
