Carbon fixation in every cover crop treatment is higher than that of winter fallow cropland.
黑麦草的碳蓄积量显著高于紫云英和油菜，各覆盖作物处理碳蓄积量均显著高于冬闲田。
2
I guess they just can't afford to let any field lie fallow, because they're already living on the edge, but the result is going to be declining yields and ultimately crop failure.
In one set of plots, she is comparing the traditional 2-year, wheat-fallow rotation with a 3-year cycle of no-till winter wheat, followed by a second crop of no-till winter wheat, followed by sorghum.