The Global Earth Products (GEP) MARVEL is an automated composting system that provides complete nutrient management for farms by composting manure and crop residuals to produce valuable organic fertilizer for on or off-site application. Bulking material having high carbon content is combined with the manure in constructed concrete channels which are automatically aerated, turned, and temperature controlled. While eliminating odours and reducing volumes by up to 75%, demonstrations on liquid swine manure have also reduced methane emissions. Manure composting also remedies the problems of surface and groundwater contamination due to nitrate leaching and run-off from spreading applications.