Agroforestry 148 Silviculture and Agroforestry 12 agroforestry 12 AGROFORESTRY 10 Agroforestry systems 10 Agroforestry and Multipurpose Trees: Community, Farm and Social Forestry 8 Silviculture 8 Agriculture 7 Forestry 6 Silviculture and agroforestry 6 Forest management 4 Forests and Forest Trees (Biology and Ecology) 4 Soil fertility 4 Agroforestry system 3 Agroforestry, agroforestry research, agroforestry problems, developing programs of research, written study plans, implementing agroforestry research, agroforestry challenge in asia 3 Agronomy 3 Biological Resources (Plant) 3 Crops 3 Forest policy 3 Forests 3 Grasslands and Rangelands 3 HORTICULTURE 3 Horticulture 3 Innovation adoption 3 Multipurpose trees 3 Natural Resource Economics, (New March 2000) 3 Plants 3 Policy and Planning 3 Research 3 Shrubs 3