Trees Plants 14 Woody plants 12 India 8 Forests and Forest Trees (Biology and Ecology) 7 Shrubs 7 Flora 6 Forest ecology 5 Forestry 5 Forests 4 Indian 4 Silviculture 4 Soil Biology 4 Agroforestry and Multipurpose Trees: Community, Farm and Social Forestry 3 Botany 3 Diseases and pests 3 Ecosystems 3 Forest plants 3 Forest trees 3 Forests and forestry 3 Horticultural Crops, (New March 2000) 3 Nitrogen fixation 3 Nitrogen fixing trees 3 Pollution and Degradation 3 Agroforestry 2 Animal Ecology 2 Biochemistry and Physiology of Microorganisms, (New March 2000) 2 Biodiversity 2 Biological Resources (Plant) 2 Climatic changes 2