There a a few sites that I relied heavily on when writing the analytics system.. wanted to pass these along:

• Cornell Composting - http://compost.css.cornell.edu/
• The University of Illinois - Composting For The Home Owner - https://web.extension.illinois.edu/homecompost/science.cfm
• Home Composting Made Easy - http://www.homecompostingmadeeasy.com/
• The Compost Gardener - http://www.the-compost-gardener.com/