土壤机械分析方法有好几种,按其原理来分,最常.用的有两类.一类叫做吸管法,另一类叫做比重计法.前者操作手续较繁,但比较精确;后者操作比较简单,需要时间少,但结果的准确程度较差.下面我们并列了三种机械分析方法,各实验室可以根据不同耍求选用其中之一.大体说来,第一种方法(吸管法)适用于精度耍求较高的工作;第二种方法(常用比重计法)适 There are several methods of soil mechanical analysis, according to the principle of points, the most common. There are two types. One is called pipette method, the other is called the hydrometer method. The former more complicated procedures, but more accurate; the latter The operation is relatively simple, requires less time, but the accuracy of the results is less. We have three parallel methods of mechanical analysis, the laboratory can choose according to different one of them.In general, the first method (pipette ) For higher precision work; the second method (commonly used hydrometer method) suitable