fallow >> ˈfaləʊ
Definition: [adjective] (of farmland) ploughed and harrowed but left for a period without being sown in order to restore its fertility or to avoid surplus production.
Example: incentives for farmers to let land lie fallow
Definition: [adjective] (of a sow) not pregnant.
Definition: [noun] a piece of fallow land.
Example: a great estate was usually divided between fallows, grazed stubble, and wheat
Definition: [verb] leave (land) fallow for a period.
Example: fallow the ground for a week or so after digging