For 16 autumns I had raked by hand the contributions of my own 12 oak trees plus an assortment of other deciduous beauti......

以中国北方退化天然草地为研究对象,测定草地刈割耙除处理后土壤温度、含水量和土壤呼吸,探讨土壤温度、含水量和土壤呼吸的变化规......