... 4-6NTotal N+P+K:≥2%Characters1:Increases the utilization of mineral fertilizers effectively in soil,prevents NPK from leaching ... locking up.2:Optimizes soil structure, increases the capacities of the earth water holding,cation exchange and aerationcondition.3:Stimulates ... microorganism,reduces pollutants in the soil,adjusts the PH value of soil andrelieves the harm caused by acid or alkaline. ...