土壤特性的鉴定和测量是土壤—车辆系统研究和评价的基础。在对拖拉机、机耕船的工作特性进行理论分析或试验研究时,都必须先测取土壤的物理机械性能。土壤的颗粒度分析和土壤含水量是土壤物理机械性能的两个最基本的参数。为了进行土壤颗粒分析和含水量测定,就必须在田 Soil characterization and measurement are the basis of soil-vehicle system research and evaluation. In the theoretical analysis or experimental study of the working characteristics of tractors and tractor ships, the physical and mechanical properties of the soil must be measured first. Soil particle size analysis and soil moisture content are the two most basic parameters of soil physical and mechanical properties. For soil particle analysis and water content determination, it must be in the field