Genese von Lockerbraunerden im Bayerischen Wald

In the Hinterer Bayerischer Wald (Germany) Lockerbraunerden (Loose Brown Earths, FAO: Dystric Cambisols) widely occur, which differ with their bright orangebrown coloured Bfv-horizons obviously from the yellowish or dark brown Bv-horizons of the Brown Earths (FAO: Cambisols). Our investigations show, that they differ also mineralogically significantly from the Bv-horizons of the Brown Earths, namely in their contents of poorly crystallized iron oxides (sequential extraction). We deduce from the high contents of oxalate soluble iron, that ferrihydrite minerals, are responsible for the characteristic morphological and physical properties of this type of soil.