cropping sequences

例句：

1. 1.The farmer used a special machine to harvest the grain from the field.
   农民使用一种特殊的机器从田间收割谷物。
2. 2. The company developed a new cropping sequence that significantly improved yield.
   该公司开发了一种新的收割序列，显著提高了产量。
3. 3.The research team analyzed the cropping sequences of different crops to optimize their planting schedules.
   研究团队分析了不同作物的收割序列，以优化种植计划。