Jed, You need to correct your ph, you can use peat moss, wich adds om, and garden sulfur, wich will boost your sulfur levels to. Nitro in a slow release form, like bloodmeal, alfa alfa meal, cottonseedmeal etc. Phosphorus you could use bone meal, soft rock phosphate.
Next to that pottasium sulfate for K wich has to go up to balance your percent base saturation. If you can bring it up to between 5 and 8% that would be good. Some ironite, and or azomite to increase iron and the minor elements and trace minerals wouldent hurt either.
I,d do another test after all of this to see what the compost did you added to.
good luck