At present,the per unit area yield of grain varies widely in the same districts,the highest yield being 7,500 kg to 15,000 kg per hectare,and the lowest 3,000 kg to 5,000 kg.

• 目前，中国同一类型地区粮食单产水平悬殊，高的每公顷7500-15000公斤，低的只有3000-5000公斤。