Manure consists of a mixture of organic matter that can be simulated if the switch Faeces pool (see section Soil Organic Processes) is on. The amount of manure can either be given as parameters of in a PG-file (see switch Manure Input). Manure is mixed as nitrogen into the litter pool, NLitter1, the faeces pool, NFaeces, or the ammonium pool, NNH. Carbon is added to the litter pool, CLitter1, and the faeces pool, CFaeces, in proportions to specified C-N ratios. Note that an explicit manure pool does not exist. The mixing into the soil is made at a certain depth zma at the time of application.