| 摘要 |
PURPOSE:To improve the soil of farming field by a method in which an arrestor is penetrated to the core soil layer and drawn out of the soil, while the arrestor is moved to the other place and penetrated, and the soil so arrested is separated in a repeating manner. CONSTITUTION:An arrestor 2 is penetrated through the tillage soil layer 3, and the hard soil layer 4 to the core soil layer 5, and the arrestor 2 with arrested soil 6 is drawn out of the soil and lifted up. The arrestor 2 with the arrested soil 6 is moved to an other place and penetrated into the farming field 1 in such a way as to separate the arrested soil 6 and at the same time to arrest the soil of the farming field. The same operations are repeated to drill pits 7 spot by spot in the farming field 1 for deep tillage, and the arrested soil 6 is apread over the farming field to obtain the replaced soil effect. |
