Tillage intensity is increasing across the US corn–soybean cropping systems due to increased weed resistance. The more intensive tillage regimes are likely to have negative impacts on greenhouse gas emissions from soils.

中文翻译：

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耕作导致温室气体排放量增加

由于杂草抗性增加，美国玉米-大豆种植系统的耕作强度正在增加。更密集的耕作制度可能会对土壤的温室气体排放产生负面影响。