noun
farmer; agriculturalist
A somewhat formal or technical term for a person engaged in agriculture, often implying a professional or managerial role rather than a simple farm laborer.
彼は農業家として新しい栽培技術を研究している。
As an agriculturalist, he is researching new cultivation techniques.
祖父は生涯を農業家として過ごし
My grandfather spent his life as a farmer.
農民 refers to peasants or the farming class in a broader, sometimes historical or social context, whereas 農業家 is a neutral term for a modern agricultural professional.
Compound of 農業 (agriculture) and 家 (person engaged in a profession).