什么叫做“三类苗?”要确切地回答这个问题是不容易的。因为这种分类是相对性的,有一类苗才有二类苗,有二类苗才有三类苗。在任何一个公社里,或者一个生产队里,在不同的田块之间,禾苗生长不可能都一样,根据差别现象,划出一类、二类和三类等类别来,以便分别管理,使大面积平衡增 What is called “three types of seed?” To answer exactly this question is not easy. Because of this classification is relative, there is a class of seedlings have two types of seedlings, there are two types of seedlings have three types of seedlings. In any commune, or in a production team, it is impossible for the growth of seedlings to be the same between different plots. According to the differences, one type, two types and three types of categories can be designated for separate management so that Large area balance increase