我们地区农作物以春麦为主,分布在海拔2,800—3,700米高原,无霜期短,季节性强,3—5月降水量少,蒸发量大。在这种条件下,多年试验证明,及时耙苗松土,能使小麦、青稞等作物显著增产。因此,我们和贫下中农一起,制成了两种耙苗松土器。一种是单列式手柄型(图1),手柄高65厘米,耙杆长170厘米,铁齿为圆锥棱形,长18厘米,齿距7厘米,钉齿上部直径1.3厘米。另一种是双列长方型(图2),前后耙杆长各160厘米,耙宽40厘 The main crops in our region are spring wheat, distributed at an altitude of 2,800-3,700 meters, with short frost-free period, strong seasonality, few precipitation in March-May and large amount of evaporation. Under these conditions, many years of experiments have proved that promptly raking seedling and loosening soil can significantly increase yields of crops such as wheat and barley. Therefore, together with the poor and middle peasants, we made two types of rake seedlings and scarifiers. One is a single handle type (Figure 1), handle 65 cm high, rake rod length of 170 cm, iron teeth for the conical prismatic, 18 cm long, pitch 7 cm, nail diameter 1.3 cm. The other is a double row rectangular (Figure 2), before and after rake rod length of 160 cm, rake width 40%