| 摘要 |
PROBLEM TO BE SOLVED: To provide a ridge formation method and formation device, suitable for field farming in, especially, a field in which impurities enter, relating to a method and device in which impurities are removed by sieving operation along with tilling operation at the same time, and the crushed soil that has passed through a sieve opening and fallen to a ground surface is accumulated to form a ridge.SOLUTION: A ridge formation method and a ridge formation device 1 form a ridge having almost the same width as a sieve device width by including a sieve device 8 which performs sieve operation by receiving the soil that is thrown from a tilling part just after the tilling part which scoops soil and throws it backward while traveling by rotating a rotor 7 containing a plurality of soil raking members. The soil is loosened to be finer by impact caused by reciprocating of the sieve device in a travel direction, and the soil is separated from other impurities, and then, a crushed soil that has passed the sieve opening and fallen to a ground surface is deposited to form a ridge. |
