National Sustainable Agriculture Information Service - ATTRA

Compost Teas: A Tool for Rhizosphere and Phyllosphere Agriculture - Steve Diver

Organic Agriculture  ( Adobe Acrobat File) - in Spanish

USDA Organic Farming and Marketing

Organic Food Production - USDA

Cornell Composting

Digital Composting - why compost?  

Carbon-Nitrogen ratio - University of California Extension Service

Compost Fundamental - Washington State University