Posted 5/23/2017 11:39 (#6032963 - in reply to #6032848) Subject: RE: What is your manure source?
Our wean to finish manure is absolutely, unfortunately not high in P. We use phytase enzyme in the feed instead of additional phosphorus, but I think the "new" feed consisting of byproducts, ddg's and pixie dust has a reasonable amount of nitrogen but less than expected P and K. So, perhaps if you could change where you manure comes from you could get a handle on your P situation. Of course if it's all your own livestock that might not be practical.