To reduce needless tedium and the chance of serious repetative strain injury, i suggest that plowed tiles should STAY plowed if they have a farmable crop (any of them) on top of them. Have you ever seen a patch of farm land turn into grass? No, because the crops block the sunlight and growth of other plants beneath them. Increase the stamina cost of harvesting to "compensate" for not having to plow the tile again if it'd be considered necessary. It'd greatly increase the survivability of plows by not having to abuse them so much for the little dribble of shit the random number generator throws at you. It'd also stop the minimap of the farm area from looking like it was made by an incompetent dumbass on LSD (and maybe ease server load by not having to change map data so randomly)
And while on the subject of hand-plowing, would it be possible to just make it do a check before it gets used and only cost the 25% when it finishes, to prevent the "oops i hand-plowed the wrong tile and now i can't plow the tile i wanted because my stamina is under 55% and if i plow a third time i'll get dropped to 30% without a plowed tile to show for it"