Balk

Balk - Turf left unplowed to provide separation between strips. A ridge left between two furrows, or a strip of ground left unploughed as a boundary line between two ploughed portions.
 * Balk:
 * 1) Turf left unplowed to provide separation between strips.

� (Gies, Frances and Joseph. Life in a Medieval Village, 243)

2) A ridge left between two furrows, or a strip of ground left unploughed as a boundary line between two ploughed portions. � (Bennett, H.S. Life on the English Manor: A Study of Peasant Conditions, 1150-1400, 337)