The Collaborative International Dictionary of English v.0.48:

Hummel \Hum"mel\, v. t. [Cf. Hamble.]
   To separate from the awns; -- said of barley. [Scot.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hummel \Hum"mel\, a.
   Having no awns or no horns; as, hummelcorn; a hummel cow.
   [Scot.]
   [1913 Webster]