Patent ID: 8465567

Claim:
A method for producing stable humus and nutrient-rich and water-storing clay-soil substrates having properties of anthropogenic soil forms (Terra Preta), comprising the following steps: (a) mixing pulverized and/or sieved pyrogenic carbon with previously pulverized and homogenized easily decomposable organic biomass, (b) inoculating the mixture by admixing a starter culture made of microorganisms to perform an anaerobic fermentation in the form of a lactic acid fermentation and/or by admixing already produced soil substrates and/or by admixing a biomass which was subjected to the lactic acid fermentation, (c) incubation of the mixture under air exclusion to perform a lactic acid fermentation at a temperature between 30° C. and 40° C. and a pH value in the acid range, controlled soil drainage and degassing being provided during the fermentation process.