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Webster 1828 Edition

ppr.

Plowing and harrowing land without sowing it.

Noun.

The operation of plowing and harrowing land without sowing it. Fallowing is found to contribute to the destruction of snails and other vermin.

fallowing

fallowing ‎(plural fallowings)

A period during which a field is left fallow.
- 1860, Albrecht Daniel Thaer, The Principles of Practical Agriculture
  The rotation of nine years with two fallowings, which was formerly so much in vogue, is now seldom or never to be met with; it was, however, productive of very fine crops of corn on tenacious soils which require a great deal of tillage.