tiny organisms which create tilth in soil

例句：

1. 1. The farmer tills the soil every day to prepare for planting.
   农民每天翻土准备种植。
2. 2. The new house sits on a piece of land that was once barren.
   新房子坐落在一块曾经贫瘠的土地上。
3. 3. The farmers are busy preparing the land for the upcoming harvest.
   农民们忙着为即将到来的收获做准备。