Effects of Continuous Cropping Soil Sterilization and Applying of Different Fertilizer on Phenolic Acids in Rhizosphere Soil of the Strawberry Plants and Soil Enzyme Activities Alleviation of vermicompost to obstacle in sterilized continuous cropping soil in strawberry production The effect of AM fungi on the growth of sweet potato Effects of Continuous Cropping Soil Sterilization and Applying of Different Fertilizer on Phenolic Acids in Rhizosphere Soil of the Strawberry Plants and Soil Enzyme Activities