而有机耕作的农民们坚持每隔两到三年换种农作物。例如，种玉米或小麦后再改种豌豆或大豆。
Instead, organic farmers insist on changing crops every two or three years, for example, corn or wheat followed by peas or soybeans.
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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