Why Compost? o Percentage of organic material increase o Agricultural wastes potential for nutrient pollution o Yard wastes-banned from landfills in some developed countries o Compost benefits to soil -11.4 kg N, 5.9kg P(as P2Os),and 3.2kg K (as K2O) per ton of compost o Environmental sustainability UNEPWhy Compost?  Percentage of organic material increase  Agricultural wastes  potential for nutrient pollution  Yard wastes – banned from landfills in some developed countries  Compost benefits to soil – 11.4 kg N, 5.9kg P (as P 2 O 5), and 3.2kg K (as K 2O) per ton of compost  Environmental sustainability