Feb 15, 2022 · Compost was produced at a full-scale composting facility by mixing poultry manure and horse bedding in a 1:1 ratio (v:v) for 90 d. The initial C:N ratio was 30:1 and the moisture content was maintained by irrigation. Composting piles were 15 m long, 1.5 m wide, and 1 m tall.