2 parts red trace mineral 1 part dical phosphate Take a steel bow rake, clear out a 3x3 spot, pour trace and dical out, use rake to work it into the soil. They'll dig a hole. Freshen up twice a year.
I also add 1 part stock salt to the mix. They tear it up! Does it help, I don't know but they love the stuff. It is a great place to get buck pictures in velvet. For some reason they tend to leave it alone when the velvet comes off.
