干旱区生态环境知识资源中心

The main source of marginal water for agriculture in arid and semi-arid regions in many countries is treated wastewater. The treated wastewater is full of organic matter and nutrients which can be absorbed by soil and plant. But there are several issues to be addressed in reuse of agriculture: acute and cumulative public health; negative effects on crops, soil, and irrigation systems; salinity effects on soil, crop and most critical, the accumulation of salts in soil layers, and in unsaturated aquifers.