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Allelopathy of Ageratum conyzoides Ⅷ. Allelopathic Effects of Residues on Peanut and Related Weeds in the Field Efficacy of propineb for controlling leaf blotch caused by Marssonina coronaria and its effect on zinc content in apple leaves Advances in study of Dioscorea zingiberensis Effects of Waterlogging on Photosynthetic Characteristics of Summer Maize under Field Conditions INTEGRATED CONTROL PROGRAM OF CITRUS HUANGLONGBIN DISEASE Characteristics of dry matter accumulation and N, P and K assimilations of trelliscultivated melon under different fertility rates EFFECTS OF SEEDLING QUALITY ON YIELD AND CONTENTS OF ENDOGENOUS HORMONE IN DOUBLE-SEASON EARLY HYBRID RICE