Forest management 181 Forest ecology 94 Forest policy 71 Forests 62 Forests and forestry 58 Forests and Forest Trees (Biology and Ecology) 44 Forestry 43 Forest 39 Forest conservation 28 Natural resources 24 Silviculture and Forest Management 24 Biodiversity 21 Forest resources 21 Silviculture 20 Ecology 19 Sustainability 18 Agroforestry 17 Human ecology 17 Biological Resources (Plant) 16 India 15 Plant Ecology 15 Plants 15 Agriculture 14 Environment 14 History 14 Rain forests 14 Sustainable forestry 14 Trees 14 Forestry Economics, (New March 2000) 13 Nature conservation 13