在农业生产和农业研究工作中,常遇到一些问题:如评定土地的肥力等级、确定作物的灌溉和施肥定额以及研究不同农业措施对土壤性质的影响等,需要进行土壤分析才能得到合理的解决。 土壤分析工作由以下三个环节组成:(1)田间取样;(2)室内分析;(3)分析结果的解释。这三个环节是同等重要的。其中任何一个环节受到忽视,都会使整个土壤分析工作受到致命的影响。如田间取样不正确,室内分析纵然精确,所得的结果也没有用。反之, In agricultural production and agricultural research, some problems are often encountered: such as assessing the fertility level of the land, determining the irrigation and fertilization ration of the crop, and studying the impact of different agricultural measures on the nature of the soil, so that the soil analysis needs to be properly solved . Soil analysis consists of the following three components: (1) field sampling; (2) indoor analysis; (3) analysis of the interpretation of the results. These three aspects are equally important. Neglecting any one of these links can have a fatal effect on the entire soil analysis. If the field sampling is not correct, indoor analysis, even if accurate, the results obtained are of no use. on the contrary,