Fallow land is not planted with crops, in order to improve the quality of the soil.

Farmers are eligible for government support if they let a certain amount of land lie fallow. 如果农民休耕一定面积的土地，他们就能获得政府资助。

A fallow period of time is one in which very little happens.

After a long fallow period, the author has brought out a new book. 沉寂了很长一段时间以后，这位作者推出了一本新书。