fertility factors 第1页

STUDIES ON SPATIAL VARIABILITY OF CONTENTS OF PETROLEUM ETHER EXTRACTS FROM FLUE-CURED TOBACCO LEAVES AND SOIL FERTILITY FACTORS IN TOBACCO PLANNING FIELDS IN CENTRAL HENAN PROVINCE Soil Peroxidase Activity and Its Relationship to Soil Fertility Factors in Songnen Alkali Grassland Qualityin fruits of Lycium barbarum and its relationship with soilfertilityfactors Polyphenol oxidase activity and its relationship to the soil main fertilizer factor in west Songnen alkali grassland