论文部分内容阅读
INTRODUCTIONMaintenanceandimprovementofsoilfertilityarecriticalproblemsinthedevelopmentofsustainableagriculture,whileapplicationoforganicmanureisrecognizedasanimportantmeansinmailltainingandimprovingsoilfertility.Somecomponentsofcropresiduesaddedtoso