Deep litter (potstal) is an animal housing system, based on the repeated spreading of material in indoor booths. The following materials are laid on the earth floor:
rice straw and hulls, kitchen refuse, grass cuttings, carabao dung, chicken manure, other organic matters.
An initial layer of litter is spread for the animals to use for bedding material and to defecate in, and as the litter is soiled, new layers of litter are continuously added by the farmer.
The old bedding is collected and used as fertilizer to be incorporated into the rice terraces. New materials are laid on the pit floor.
The old bedding is collected.