pin fallow
/ˈpɪn ˌfaləʊ/Agriculture. Chiefly English regional (northern and midlands )
noun
The action or an act of leaving land fallow for a limited period after ploughing, especially during the winter; land that lies fallow during the winter; a period during which land lies fallow.
- Apparently unattested in the 19th cent., although compare pin-fallow..
Origin
Late 17th century; earliest use found in Randle Holme (1627–1700), herald painter. From a first element of uncertain origin + fallow.