n. A layer of leaves, needles, fine twigs, and other organic material on the forest or grassland floor that has undergone little or no decomposition.
The litter layer, also called the L-layer and Oi soil horizon, is found above the duff layer or mineral soil. All the original plant structures are recognizable in the litter layer. In forest soil, the litter layer undergoes further decomposition to form the duff layer. The litter layer is characterized by litter depth and litter load.