Here's a great example of the value of residue. If you're a corn producer, for every bushel of corn you grow, your residue contains an average of 0.45 lbs of nitrogen, 0.16 lbs of phosphorus, and 1.1 lbs of potassium. If you have a 200-bushel crop, that's an NPK value of 90-32-220. A broadcast application of EXTRACT PBA in the fall or spring can help to release that nutrition from the residue for the spring crop.