Politico has an article on the farm bill, summarizing the current status but with some discussion of the sectional differences Midwest versus South. It argues that current plantings have increased in the Midwest, not so in the South. (I've a reservation, TX and OK are down in current plantings, presumably partially because of drought. )
The issue of basing payments on planted acres versus base acres is always interesting: do we want the safety net for current and future farmers or for past farmers? The issue of yields gets less attention--I've lost track of whether there's been any updating of yields in past farm bills. A fine kettle of questions for some philosopher/economist to figure out.