Deep litter (potstal) in the Netherlands

Deep litter (potstal) is an animal housing system, based on the repeated spreading of straw or sawdust material in indoor booths. 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. In this fashion, a deep litter bedding can build up to depths of 1-2 metres. The deep litter was used for fertilising the fields.