1) An expert in agriculture 2) Cultivator 3) Farmer 4) Granger 5) Grower 6) Husbandman 7) Raiser 8) Sodbuster 1) Cultivator 2) Farmer 3) Grower 4) Viticulturist 
• (n.) One engaged or skilled in agriculture; a husbandman.
Ag`ri·cul'tur·ist noun One engaged or skilled in agriculture; a husbandman. « The farmer is always a practitioner, the agriculturist may be a mere theorist. Crabb. » 
[n] - someone concerned with the science or art or business of cultivating the soil
agriculturist A student of the science of agriculture, (but soon extended to) a professed cultivator of the land, a farmer (for which agriculturalist, is also used).
agriculturalist noun someone concerned with the science or art or business of cultivating the soil
a farmer. · an expert in agriculture.