Arid regions 53 Arid regions agriculture 14 Congresses 14 Research 10 Arid regions ecology 5 Range management 5 Arid regions plants 4 Deserts 4 Land use 4 Arid regions climate 3 Groundwater 3 Hydrology 3 Plants 3 Range ecology 3 Water-supply 3 Arid regions forestry 2 Botany, Economic 2 Carbon sequestration 2 Case studies 2 Conservation of natural resources 2 Desert resources development 2 Dry farming 2 Economic aspects 2 Energy development 2 Environmental aspects 2 Environmental protection 2 Irrigation 2 Planning 2 Rangelands 2 Soils 2