Moder humus

Moder is a forest floortype formed under coniferous forests, mixed-wood and pure deciduous forests. Moder is a kind of humus form whose properties are the transition between mor humus and mull humus types. Moder is similar to mor as it is made up of partially to fully humified organic components accumulated on the mineral soil, while compared to mull, moder is zoologically active. In addition, moder presents as in the middle of mor and mull with a higher decomposition capacity than mull but lower than mor. Moder is characterized by a slow rate of litter decomposition by litter-dwelling organisms and fungi, leading to the accumulation of organic residues, mainly in the form of invertebrate fecal pellets. Moder has been described by Franz Hartmann, midway between mull and mor and was previously described as 'insect mull'.