The compost in a bag like you get at the home center usually has some natural fertilizer in it besides just yard waste. It may even have a combination. You will often find composted chicken manure, cow manure, bat guano, worm castings, or biosolids (digested sewage) listed in the ingredients. No matter the ingredients, it is always a good idea to wear gloves when spreading. Compost fertilizes, builds soil structure, retains moisture, and improves drainage. It will improve any soil.
People who are unwilling to use animal and fish products should probably ignore my fish emulsion and blood meal suggestions from my last post.
I looked a little more at the Rodale Institutes website yesterday. It also appears that the organic farmers will sometimes add Rock Phosphate as well as lime to the soil. Again it depends on the soil test.
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