CHEMICAL BEHAVIOR OF AS IN PURPLE SOILS AND THEIR EFFECTS ON CROP
砷在三种紫色土中的化学行为及其与作物效应的关系

The adsorption, transformation and effect on crop of As in acid, neutral and limy purple soils were studied using pot experiment. The results showed that the accumulation of As in crop depends on the adsorption of As on the soils and the transformation of As in the soils. The most important fractions of soil As are A-As and Ca-As.