Risk Assessment Agriculture-Methods Case studies Farmers' income Health Risk, Minimizing Human Health and the Environment Human Wastes and Refuse Income and Poverty Irrigation Public health Public health-Developing countries Sewage Sewage irrigation Sewage irrigation-Developing countries Sewage-Health aspects Soil Water Management (Irrigation and Drainage), (Revised June 2002) Wastewater Wastewater treatment Wastewater treatment plants Water Purification Water Resources Water resources Water reuse