At Wangdong gully experimental area in Changwu county，through systematic field experiment for more than 10 years.and by adopting high-yield and drought proof tecitniclue} in different precipitation-type years of grain crops

in the year 1993 when the rainfall tended to nor-mal level，the wheat yield was 4 9}14kg/hm2，the corn yield was 9 478. 5 kg/hm2。the grain per unit area yield was 6 256. 5 kg/hm2·which was the highest level in the history and was also the rare record in world dry farming. In the year 1995 when the drought had been the most serious since 1928，the grain yield still reached 1 504. 5 kg/hm2which was a good harvest. It was equivalent to the normal annual yield before 1980. During eighth five-year plan，in the critical condition of successively arid with two especially serious arid years in addition .the average grain yield was 3724. 5 kg/hm2，it belongs to the first-class level at the similar type regions in loess plateau. Thereby fully demostrates that the integrated abilities of getting bumper crops and disas-ter-resistance in grain production have been enhanced perimental area has gotten into a stage of sustainable development.