I have been using SumaGroulx for 5 years on my Black beans, using NO fertilizer. The growing conditions are different every year, but SumaGroulx is consistent. I always get at least 20% more yield. On my sugar beet crop, this was my first year and they were my best ever. I got 35 ton per acre with over 20% sugar. Great results for a very dry year, and finally, I used SumaGroulx on my soybeans and got more than a 20% increase. With SumaGroulx, I got 70 bushel per acre and without 50 bushel per acre.