Fertilizing nitrogen

phosphor and nitrogen+phosphor were useful for water conditions of spring wheat under 13%-15% soil water content during early growth.All the three could increase relative water content

water poten tialand water holding capacity. thus water use efficiency could be raised. At research spot phosphor and nitrogent phosphor fertilizers had higher effects than nitrogen had

so phosphor might be the key factor of limiting water use.It is imPOrtant to use phosphor fertilizer in semiarid fields.