对于日式刀片，由于是其纵向弯曲部分先耕土，耕作转矩的增加比其他两种刀片要小。

For the Japanese blade, since its lengthwise curved portion tilled the soil first, the increase of tilling torque was less than the other two blades.

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随着免耕年限延长，土壤微生物商呈先增加再降低的趋势，免耕10年以上土壤微生物商最低。

The microbial quotient increased firstly, then decreased, along with the no-tillage years increasing, which was lowest in no-tillage 10 years.

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