I can't remember the compound either, but I have Walnuts and Hickories only on the back 1/3 of the property. The leaves in question are oak, maple, box elder, sassafras, dogwood, redbud and sycamore. These are shredded and applied as a sheet compost along with grass clippings. This can contribute to acidic soil conditions so lime must be applied when using these. These make leaf mold and feed earthworms, that in turn feed the plants with their castings. The worms also help loosen the compacted soil.