Economics is major factor in crop selection. Multiple cropping is primarily limited to the warm temperate climatic zone. Common combination is wheat in winter and corn or sorghum in summer 5. Diversity of crops grown on irrigated farms in warm temperate climatic zone is tremendous. Ca grows 200 different crops 6.
Salinity effects large areas of irrigated land.
Salt-tolerant crops such as barley, alfalfa, sugar beets, and cotton are favored 7. Fruit production is a major enterprise in region. This is all on irrigated land Crop Production Systems 1. Fertilizers can be fairly accurately estimated based on soil tests and knowledge of crop requirements. Use higher populations with adequate water and high soil fertility 4.