The first generations of humic substances are commercially produced humic substances, which are obtained by extraction, and subsequently by physical and chemical treatments of materials similar to coal. It is a part of the organic matter commonly called LeonarditeAt the end of the 19th century German and Russian scientists recorded high biological activity of these materials. We can say that manufacturing of these “coal-based humates” started early in the 20th Century. For over 100 years these technologies have been improved to the present forms, but all of these technologies are very similar. They are all based in the extraction of humic substances contained in the raw material. These substances originated at high pressures and temperatures deep in the earth over millions of years, and it is logical that the low molecular parts of humic spectrum and salts of humic acids were, due to their perfect solubility over time, leached out. Humic acids, (which also have the unique property of binding to other heavy metals) still remained, but over time they attach themselves to a large number of these elements. The final product has to be purified from the heavy metals, which increases the cost of this type of humates. Cleaner humate, even more fragmented, is more expensive. These materials cannot be fully soluble and therefore have a limited application in agriculture. According to producers’ data these products contain also low molecular parts of humic spectrum. Spanish and American manufactures of the highest quality humic substances claim up to 6 % of fulvic acids; however, these data should be treated with caution – even the best mining machine will not affect the composition of the deposits of leonardite, and final humic substance will only have that part of humic spectrum which has remained after these millions of years.