The best courses for "study of ecological processes in agriculture", agroecology.
Organic Soil Building for the Backyard Organic Gardener
by Chris Badgett
Healthy Soils - Compost, Mulch and the Soil Food Web
by Rob Littlepage
Food Forest Design & Care for Cities and Suburbs
Soil, The Key To Organic Gardening
by Organic Gardening Marleny Franco