Have you ever thought of adding wood ashes to your compost? From BND.com an article is written by Charles Giedeman. This question has been raised and answered at the same time. This depends on the kind of wood being burned. However, they produce elements such as nitrogen, boron, copper, zinc, calcium carbonate, and others which can increase the pH level of the soil. When this happens, the nutrients in the soil are damaged. However, you can still use them as long as you will evenly and lightly distribute them to the surface.
Another topic which is discussed in this article is about bioremediation techniques. Click here to continue reading.