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为了及时掌握苗情,分析群体动态,不失时机地进行田间管理,就需要及时调查田间苗数。现介绍一种简易、快速查苗法: 大家都知道一亩地是666.67平方米。这个数字是由“长×宽”而得。所以当我们知道某种作物的播种行距后(或田间直接调查出其行距),就可以求出一亩地单行的总长。例如;行距是15公分(0.15米): 那么:
In order to grasp the Miao, timely analysis of group dynamics, lost no time in field management, we need to promptly investigate the number of seedlings in the field. Now introduce a simple, quick check seedling law: We all know that an acre of land is 666.67 square meters. This figure is derived from “length × width”. So when we know the sowing distance of a certain crop (or the field directly measured the line spacing), we can find the total length of a single acre of a single line. For example; spacing is 15 cm (0.15 m): then: