Weather and climate Atmosphere 2 Agroclimatic and agroecological regions 1 Basic elements of sustainable agriculture 1 Climate change;Carbon cycle 1 Clouds 1 Definition of agriculture 1 Dry farming practices 1 Dryland and irrigated agriculture 1 Earth 1 Ecology and ecosystem 1 Geography 1 Global warming 1 History of agricultural development 1 Hydrological cycle 1 Hydrology 1 Platetetronics 1 Population 1 Soils and ecosystems 1 Solar radiation 1 Tourism 1