Trees 97 Forests and Forest Trees (Biology and Ecology) 44 Forests 33 Forest management 23 Forestry 22 Silviculture and Forest Management 22 Plants 19 Biological Resources (Plant) 17 Sustainability 17 Forest ecology 16 Forests and forestry 14 Plant Ecology 14 Policy and Planning 13 TREES 13 Woody plants 13 Agroforestry 12 Biodiversity 12 Forest policy 12 Forestry Economics, (New March 2000) 12 Natural Resource Economics, (New March 2000) 12 Nature conservation 12 Forest trees 11 Shrubs 10 Silviculture 10 India 9 Pollution and Degradation 9 Agroforestry and Multipurpose Trees: Community, Farm and Social Forestry 8 Botany 8 Land Resources 8 Meteorology and Climate 8