Do you know what caused the crash? What you were doing when the game crashed? I've considered an auto-save function, but I also want to solve crashes as well. of course.
1 ingame day is about 24 minutes give or take. Seems feasible, maybe just an autosave that goes off each time, and saves to an invisible slot which you can load from if you choose.
How much wheat are we talking by the way loool. like a couple rows? or 100+?