The crops will get a certain amount of light(per any given day) regardless of how humans set their clocks. Did you perhaps misquote what the farmers were saying? Or were you trying to be funny? Let say on any day...let’s say June 1st; no matter if you had dst or not, the amount of light is the same for the crops. The crops don’t care how we set our clocks....but you were just being funny, right?
That joke is fifty years old. Surprised you never heard it before. Your condescending explanation is quite unnecessary.