Sorghum Rice 4 Maize 3 Wheat 3 Climatic change 1 Climatic changes 1 Climatic factors 1 Cotton 1 Crop production 1 Crop yield 1 Crop yields 1 Crops and climate 1 Ecosystems 1 Emission 1 Environmental factors 1 Field Crops, (New March 2000) 1 Glycine (Fabaceae) 1 Gossypium 1 Grasslands 1 Greenhouse gases 1 Horticultural Crops, (New March 2000) 1 Hybrid rice 1 Meteorology and Climate 1 Millets 1 Oat 1 Oryza 1 Oryza sativa 1 Peanuts 1 Pearl millet 1 Plant Production 1