Land management Land Resources 6 Sustainability 5 Land use 4 Biological Resources (General) 3 Natural Resource Economics, (New March 2000) 3 Pollution and Degradation 3 Silviculture and Forest Management 3 Social Psychology and Social Anthropology, (New March 2000) 3 Water management 3 Biodiversity 2 Case studies 2 Conflict 2 Cropping systems 2 Environmental degradation 2 Environmental management 2 Field Crops, (New March 2000) 2 Forest management 2 Forests 2 Forests and Forest Trees (Biology and Ecology) 2 Nature conservation 2 Plant Cropping Systems 2 Water Resources 2 Agricultural Economics 1 Agricultural land 1 Agricultural policy 1 Agriculture 1 Agroforestry 1 Agroforestry and Multipurpose Trees: Community, Farm and Social Forestry 1 Agroforestry systems 1