Light Agriculture 1 Agroforestry and Multipurpose Trees: Community, Farm and Social Forestry 1 Animal Ecology 1 Biological Resources (General) 1 Biological Resources (Plant) 1 Botanical composition 1 Carbondioxide 1 Chilling and freezing 1 Climax communities 1 Drought 1 Forest dynamics 1 Forest ecology 1 Forests 1 Forests and Forest Trees (Biology and Ecology) 1 Forests and forestry 1 Grasslands 1 Grasslands and Rangelands 1 Grazing 1 Herbivores 1 High temprature 1 History 1 History and Biography 1 Land Resources 1 Land use 1 Landscape ecology 1 Lowland areas 1 Natural grasslands 1 Nature reserves 1 Nitrogen 1