Source : Webster's Revised Unabridged Dictionary (1913)

Agronomic \Ag`ro*nom"ic\, Agronomical \Ag`ro*nom"ic*al\, [Cf. F.
   agronomique.]
   Pertaining to agronomy, of the management of farms.

Source : WordNet®

agronomical
     adj : of or relating to or promoting agronomy [syn: {agronomic}]