The definition of a healthy soil has been illusive as we are only now discovering the most essential parts of the bio-geo-chemical partners that need to be in place to achieve optimum plant nutrition and a healthy, productive soil. This article by Michael Martin Meléndrez will attempt to introduce readers to some of this new soil science. It explores the benefits of humic & fulvic acids derivered from brown coal, lignite & leonardite over composts. Read more.