The rate at which composting occurs depends on physical as well as chemical factors.
Temperature is a key parameter determining the success of composting operations.
Physical characteristics of the compost ingredients, including moisture content and particle size, affect the rate at which composting occurs. Other physical considerations include the size and shape of the system, which affect the type and rate of aeration and the tendency of the compost to retain or dissipate the heat that is generated. Temperature Curve Compost heat is produced as a by-product of the microbial breakdown of organic material. You can chart the health and progress of your compost system by taking periodic temperature measurements . A typical temperature curve for an unturned pile is shown below.