四川省北川县位于岷山支脉,境内山高地陡,河流纵横,非农耕地约占82.5%,生产潜力很大,特别是复兴乡有42华里的小河横贯其间,沿河两岸大多为砂砾土,有石窖、响砂、潮砂和绵砂四类土,土壤水份充足,据速测结果:氮,磷含量稍低,钾的含量中高,酸碱度为7.5—8.0之间,适宜于油菜生长。因 Beichuan County in Sichuan Province is located in the Minshan branch vein, the steep mountain territory, the river vertical and horizontal, non-agricultural land accounts for about 82.5%, great potential for production, especially in Fuxing Township 42 Wuli River runs through the meantime, mostly along the banks of sand and gravel, There are cellar, ring sand, tidal sand and Mian sand four types of soil, soil moisture sufficient, according to the instant test results: nitrogen, phosphorus content is slightly lower, high potassium content, pH between 7.5-8.0, suitable for rape growth . because