Sentence:  The presence of charcoal from vegetation fires was investigated in Axp and Axh horizons originating from a catena of <WSD>Chernozemic</WSD> soils south of Hannover using a suite of complementary methods (high energy ultraviolet photo-oxidation, scanning electron microscopy, solic state 13C nuclear magnetic resonance, lignin analysis by CuO oxidation). 
Meaning of the word marked with <WSD> tags:  Of or pertaining to an (order) of (soils) with (chernozemic) characteristics.