Compost manure-based compost is mature and tested. It is made from animal manure as the nitrogen source and sawdust as the carbon source. The manure is mainly poultry manure due to local sourcing. This product is blended to the proper ratio of carbon to nitrogen and allowed to start the composting process. Through proper time and temperature intervals, the pile is tossed and composted... https://texasgardenmaterials.com/product/manure-compost-premium/