In the northern wheat growing areas, most of the water used by the wheat crop falls before the growing season and the crop is grown mainly on stored moisture from fallowing.

• 在南部小麦栽培区，大部分雨水分布在4至10月份之间，这是小麦大致的生育期，尽管也有一些地区土壤水分是靠休闲时储蓄的。