cost of planting

例句：

1. 1.The farmer planted a new variety of corn in the field.
   农民在田地里种了一种新的玉米品种。
2. 2. The seeds were planted in the ground before winter.
   种子在冬天前被种在地里。
3. 3.The city is planning to plant more trees to improve air quality.
   这个城市计划种植更多的树木以改善空气质量。