土壤的机械组成是一项重要的土壤物理性质.不仅各项研究工作必须进行土壤机械分析,就是农业生产实践也经常要求了解这一性质.由于一般土壤机械分析的手续和设备并不算简单,往往限制了它在实践工作中的应用. The mechanical composition of soils is an important soil physical property. Not only must each research work carry out soil mechanical analysis, which is often called for in agricultural practice. Because the procedures and equipment for soil mechanical analysis are not simple, Often limits its application in practical work.