Abstract: Zoning for control of agricultural non-point source pollution(ANSP)and identifying critical source areas may help improve efficiency of the control of agricultural non-point source pollution.Throgh inventory analysis,discharge and concentration of ANSP(COD,TN and TP)was analyzed and calculated quantitatively,and based on sensitivity assessment and clssification of ANSP,methods for zoning of ANSP were explored and principles and methods for zoning and nomenclature of the zones were put forth.Zoning may help realize management at different levels and control by sort of ANSP.The method was applied to ANSP zoning of the 64 counties of Jiangsu Provence.The countries were being used as basic units. 

Key words: agricultural non-point source pollution(ANSP), inventory analysis, sensitivity assessment, critical source area, pollution control zoning