Utilization of soil water and nitrogen resources in dry land under a long-term fertilizer experiment

Utilization rate of nitrogenous fertilizer and use of deep storage water are studied on the base of a long-term located fertilizer test in this paper．The results show that utilization rate of N is higher in dry land．Lots of N may increase the production and reduce the storage of water．Soil moisture is adjusted by soil reservoir greatly，which is important in drought region．