Thanks Dennis, I don't need the field at all. Do you spray to kill it before you plow it up?
I never have. Only time I have used chemicals was for my hay fields. For food plot, I do the same as PMK does, in August when It's hot, disking will generally kill most growing plants, then I will disk again before planting my fall plot. When I disc, I do it all one direction, then again, crossing over the 1st the opposite direction, that gets near everything. If I am leaving the seed for birds, I will just disc right before planting, but you will still get a small amount of germination.
Leaving a thick cover on it, draws in bugs, which will feed birds ( young turkey and quail )
If the field is really tall and thick though, I will definitely shred it and disc in August.