At least as a temporary measure, draw up the current stuff as a series of half a dozen sprites that fit on half the tile and then make it two sprites for the wheat please. Do thi at LEAST until you can figure out wtf is causing this game to lag so badly and consume so many resources to begin with.
Please you're making my eyes bleed every time I go by the farms. We have a special place just for building mansions. We call it the 'lag-fields'.
It's a cheap fix to make the game bearable until you can figure out wtf the core issue is and fix it. GRanted, but it would really make the game much more playable.