Geochemical classification of soils in the downstream area of the Jiulong River, Fujian Province

Abstract：Take for example the geochemistry of Changtai, Zhangzhou and Longhai in the downstream area of the Jiulong River, Fujian, by using the data of multi-target regional geochemical investigation, this paper discusses the method of geochemical classification of soils and proposes a scheme of classification and nomenclature and diagnostic criteria. The soils in the area is divided into four major classes: Fe-Al soil, Si-Al soil, Al-Si soil and siliceous soil, of which Si-Al soil is further divided into four subclasses: ordinary Si-Al soil, ferruginous Si-Al soil, potassic Si-Al soil and pyritic Si-Al soil. The average contents of 52 elements of various soils (siliceous soil excluded) and their uses in agriculture are investigated.