Agroforestry systems Agroforestry 3 Agroforestry and Multipurpose Trees: Community, Farm and Social Forestry 3 Agriculture meterology 2 Crop production 2 Grasslands and Rangelands 2 Irrigation water management 2 Natural Resource Economics, (New March 2000) 2 Silviculture and Forest Management 2 Weed management 2 Agricultural soils 1 Biodiversity 1 Biological Resources (Animal) 1 Biological Resources (Plant) 1 Biomass 1 Case studies 1 Crops 1 Decomposition 1 Ecology (General) 1 Economic analysis 1 Economy of Forest management 1 Erosion 1 Erosion: Soil and Water Conservation 1 Extension and Advisory Work 1 Farmers' attitudes 1 Forest Dynamics 1 Forest management 1 Forest policy 1 Forest soils 1 Forestry Economics, (New March 2000) 1