The Collaborative International Dictionary of English v.0.48:

Faldage \Fald"age\, n. [LL. faldagium, fr. AS. fald, E. fold.
   Cf. Foldage.] (O. Eng. Law)
   A privilege of setting up, and moving about, folds for sheep,
   in any fields within manors, in order to manure them; --
   often reserved to himself by the lord of the manor.
   --Spelman.
   [1913 Webster]