Source : Webster's Revised Unabridged Dictionary (1913)

Agriculturist \Ag`ri*cul"tur*ist\, n.
   One engaged or skilled in agriculture; a husbandman.

         The farmer is always a practitioner, the agriculturist
         may be a mere theorist.                  --Crabb.

Source : WordNet®

agriculturist
     n : someone concerned with the science or art or business of
         cultivating the soil [syn: {cultivator}, {grower}, {raiser}]