论文部分内容阅读
在经济作物的种植过程当中,对种床形状的要求较高。以在西北广泛种植的蕃茄为例,传统作业方式,拖拉机至少三次下地才能完成。一般是第一次灭
In the process of planting cash crops, the requirements of the seedbed shape is higher. Take the tomato planted widely in the northwest as an example. Traditionally, tractors can go down at least three times. Generally the first time off