Many of us plant trees or grow crops to conserve soil. So much so that we use artificial chemical fertilizers and pesticides to get better yields in all crops. Recently I have discovered picnic insecticides in Bangladesh if weed control. It suppresses weeds but destroys soil fertility. In the same way, excessive use of crop fertilizers destroys soil fertility. We all should use organic fertilizers in the soil instead of these chemical fertilizers. Organic fertilizers undoubtedly increase soil fertility.