物元分析法在生态农业模式设计中的应用以山西省防风固沙生态区为例徐保根聂宏声张晓玲(山西省农业科学院综合考察所,太原030006)ApplicationoftheMethodofMaterElementAnalysisintheDesignofEcol...
Application of Matter Element Analysis in the
With impacts from extreme climate conditionssuch as drought,cold weather andstorms,and price fluctuations of rawmaterials,the pesticide market in China wasstil