我区无霜期短,十年九旱,各种自然灾害频繁,在无灌溉条件的地区,农作物出苗、保苗是比较困难的。每年春季常因土壤墒情太差,种子不能发芽,或是因风刮沙压,不得不进行改种、补种。也常因播种期已过,再播种其它作物不能成熟, My area frost-free period is short, ten years nine drought, frequent all kinds of natural disasters, in areas without irrigation conditions, crop emergence, seedling protection is more difficult. Spring often due to soil moisture is often poor, the seeds can not germinate, or because of sand wind pressure, had to be re-planting, replanting. Often due to the sowing period has passed, then sowing other crops can not mature,