In turn, farmers are converting land formerly left untilled into cropland, and ceasing to rotate corn and soybean crops from year to year, in favor of corn.

• 与此相应地，农民们把先前留下来的未开垦的土地改造成玉米田地，停止了年年玉米和大豆的轮流更种，以便有利于玉米的生长。