Patent ID: 7510590

Claim:
A process for preparing an enriched extract rich in alkali metal salts of humic acids from various sources of humic substances for modifying and improving plant growing as said enriched extract comprises the most possible characteristics of each source in one single enriched extract, which process comprises the steps of: a) obtaining a first alkaline extract by combining a first source of humic substances selected from the group of organic sources consisting of peat, manure, compost and worm compost; or from the group of mineral sources consisting of leonardite and other lignite-type fossil carbons and derivatives thereof, with an alkaline solution with agitation and for time sufficient to extract active ingredients of the first selected source and with an alkalinity sufficient for keeping in solution all soluble ingredients; b) separating resulting extract and replacing it with water, repeating the process, collecting the obtained extracts once separated them from the insoluble materials; c) adding to these first extracts, with constant agitation, a second source of humic substances different from the first source, selected from the group of organic sources consisting of peat, manure, compost and worm compost; or from the group of mineral sources consisting of leonardite and other lignite-type fossil carbons and derivatives thereof, together with another alkaline solution in order to obtain an enriched extract having alkali metal salts of humic acids from both first and second sources; and d) wherein residual alkalinity of the first extract is used together with said other alkaline solution for obtaining the enriched extract.