耕作可以清除杂草和上一季的农作物残茬，并且有助于将原来的农作物残茬分解成化肥，但它也会增加因风蚀、水蚀造成水土流失的风险。
Tilling can remove weeds and the waste from last season's crops and help break down old plant material into fertilizer. But it can also increase the risk of soil erosion by rain or wind.
用大量秸秆残茬覆盖地表是保护性耕作的主要特征之一。
Using many straws to cover the earth is one of main character of protection cultivation.
对小麦机械收获后残茬覆盖与不覆盖两种条件下免耕、翻耕和间隔深松三种土壤耕作方式夏玉米的营养生长及籽粒产量进行了研究。
The growth and grain yield of summer maize in three kinds tillage management of no tillage, moldboard plowing and sub-soiling under two conditions of stubble mulch and no mulch have been conducted.
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