National Agroforestry Center:
http://cwis.unl.edu/nac/alleycropping.htm

UMCA DVD:
Visit www.centerforagroforestry.org or the University of Missouri Extension web page at http://extension.missouri.edu/explore/agguides/agroforestry/index.htm to purchase.

In Print:
Garrett, H.E., W.J. Rietveld and R.F. Fisher (eds.) 2000. North American Agroforestry: An Integrated Science and Practice. American Society of Agronomy. pp. 149-188. (Chapter 6)

UMCA Research Publications:
http://www.centerforagroforestry.org/research/pubs.asp

From the United Kingdom:
http://www.agroforestry.co.uk/silvoar.html

From the Association For Temperate Agroforestry (AFTA):
http://www.aftaweb.org/entserv1.php?page=1

From the University of Florida:
http://cstaf.ifas.ufl.edu/research2.htm

From Australia:
http://www.rirdc.gov.au/pub/shortreps/sr8.html

For additional information on the characteristics of individual forage species:
Forages Vol. 1: An Introduction to Grassland Agriculture by Barnes, Miller, & Nelson, 1995, Iowa State University Press.

Southern Forages by Ball, Hoveland, & Lacefield, 1991, Potash and Phosphate Institute

Pasture Management Guide for Northern Missouri by USDA NRCS, Ingalls, John J., 1998.

From USDA SARE:
Manage Insects on Your Farm. http://www.sare.org/publications/insect.htm