Water management Water Resources 15 Soil Water Management (Irrigation and Drainage), (Revised June 2002) 13 Irrigation 8 Natural Resource Economics, (New March 2000) 7 Sustainability 7 Water resources 7 more ... Management 6 Plant Production 5 Water use 5 Irrigation systems 4 Irrigation water 4 Social Psychology and Social Anthropology, (New March 2000) 4 Water policy 4 Water-supply, Agricultural 4 Watershed management 4 Agricultural Economics 3 Case studies 3 Crop production 3 Decision making 3 Ecosystems 3 Food Economics, (New March 2000) 3 Food security 3 Groundwater 3 Horticultural Crops, (New March 2000) 3 Land Resources 3 Meteorology and Climate 3 Planning 3 Policy and Planning 3 Pollution and Degradation 3 less ...