Manure, H2SO4-treated slaughterhouse waste and lignite or lignite-magnesite topsoils from breeding geeses were blended to a mineral-org. fertilizer with K2SO4, (NH4)(3)PO4, microelement salts and ash from wood combustion. The fertilizer was analyzed for elemental compn. and microbial contamination with bacteria and fungi and tested in field expts. with mustard and maize. The crops did not differ from those obtained after use of conventional mineral fertilizers.