The Collaborative International Dictionary of English v.0.48:

Turbary \Tur"ba*ry\, n.; pl. Turbaries. [LL. turbaria a place
   for digging peat, from turba peat. See Turf.] (Eng. Law)
   A right of digging turf on another man's land; also, the
   ground where turf is dug.
   [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

TURBARY, Eng. law. A right to dig turf; an easement.