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1985年在海拔1500米的下川乡覆膜小麦102亩,平均亩产397.3公斤,比对照增产216.3公斤。1986年覆膜2269亩,平均
In 1985 at an altitude of 1,500 meters Xiachuan countryside covered 102 acres of wheat, the average yield of 397.3 kilograms, 216.3 kilograms more than the control increase. 1986 covered 2269 acres, on average