I would like to add a few books more to couple of reply's
you have already received.
Soil Ecology (related book) by ken Killham, Cambridge Univ. Press Publication.
Agroecology: The Science of Sustainable Agriculture by
Miguel A. Altieri. Westview Publications.
Sustainable Agricultural Systems (related interesting book),
(Eds.)C.A.Edwards, Lal,Madden, Miller and House, Soil & Water Conservation
Good luck with your course.
Jay Daliparthy, Ph.D.
Dept. of Plant and Soil Sciences
Univ. of Massachusetts
Amherst MA 01003
Ph: (413) 545 1843
Fax: (413) 545 0260