Re: 4\" Stump Removal
Here is one method from a local organic garden talk show.
"Stump removal - Any kind of sugar or nitrogen product will do the trick. First, start by drilling holes in the stump. Make the holes as large and deep and closely spaced as possible. Fill the holes with sugar, molasses, syrup, old jellies, jams, candies, buttermilk, or fertilizer of any kind. This is a good place to dispose of any synthetic fertilizers you might still have around the place, although organics would certainly be better. Next, wet the stump and additions and cover with a thick layer of shredded mulch. How long the rotting takes depends on the type of tree. Bois d arc will take the longest to rot using this or any other technique. A more practical approach for some is to hire a tree care company to grind the stump out mechanically. It's quick, always successful and doesn't cost much.
Don't pour any toxic herbicides into the holes as is commonly recommended. The toxins will eventually seep out and contaminate the soil and the roots of nearby desirable plants. Plus, the toxic products are not needed. The food products work just as well or better."