We like to pick the bales up a soon as we can. They kill out the spot they sit on. And tracking the regrowth.
That is the way it should be done. I move them out of the field while they're being baled if I can. Anyone who leaves them in a field that has grass that will grow back, is a very poor steward of the land. Bales left for months will do exactly what Wabigoon says, and kill the grass underneath them.
I realize that there may be situations where bales cannot be removed for a time, but in a worst case scenario, they should at least me moved to the field edges.
