Control and management of agricultural non-point source pollution 并列题名：Control and management of agricultural non-point source pollution Research of controlling agricultural non-point source pollution Research on agricultural non-point source pollution 并列题名：Research on agricultural non-point source pollution Study on management and control of agricultural non-point source pollution in China 并列题名：Study on management and control of agricultural non-point source pollution in China Prevention and control strategies for agricultural non-point source pollution in China 并列题名：Research of controlling agricultural non-point source pollution Study on the prevention and control of regional agricultural non-point source pollution