一、序言近年来全世界都在开展土测工作,取得了不同程度的成绩。一些地方农学家们不十分相信土测的可靠性与适用性。实际上是由于人们的期望超过土测这个手段的能力所造成的。许多流行的误解似乎在于不能判断土测能做什么和不能做什么。本文将阐述构成土测的一些原理和事实。“土测”从狭义上讲是指通过快速的化学方法去评价一种土壤的有效养分状况;从广义 I. Preface In recent years, earthwork has been carried out all over the world and achieved different grades. Some agronomists do not quite believe the reliability and applicability of soil testing. It is actually caused by people’s ability to exceed the means of soil testing. Many popular misunderstandings seem to lie in the inability to judge what earth exploration can and can not do. This article explains some of the principles and facts that make up earth tests. In its narrow sense, “soil testing” refers to the rapid chemical method to evaluate the effective nutrient status of a soil. From a broad sense