Soil Building for Better Crops

http://www.betuco.be/CA/Building%20Soils%20for%20Better%20Crops.pdf

Ultimately, the quality and quantity of any plant or crop depends upon the quality of the soil it's grown in. This handy and practical manual provides good information on intelligent and ecological managment of soil. The beginner agriculturalist or horticulturalist can find much of use here, as will one looking for a more ecological approach. Topics include soil basics such as nutrients and physical properties, ecological soil and crop management, and soil health evaluation.