当前各地进行的土壤普查,对测定土壤主要养分含量普遍给予极大重视,这反映了农业生产上对合理施肥等方面的迫切需要。大量事例表明,正确利用土壤养分的测定,可以在经济合理施肥,以及开辟肥源、作物布局等方面起到一定作用。但也有一些不大成功,甚至失败的例子,这说明掌握正确的方法是重要的。当前在土壤普查与养分测定的关系,取土点的代表面积,测定的 At present, the soil censuses carried out all over the world have given great importance to the determination of the main nutrient contents of the soil, which reflects the urgent need for rational fertilization in agricultural production. A large number of examples show that the correct utilization of soil nutrients can play an important role in economic and rational fertilization and in opening up fertilizer sources and crop layout. But there are some examples of less successful or even unsuccessful ones, which shows that it is important to have the right approach. The current relationship between soil census and nutrient determination, taking the representative area of ​​soil points, measured