There is a vast literature on the subject. Some good books/booklets you can read to get more information are:
CIPAV. 1989. J. Livestock Research for Rural Development. Cali, Colombia. (diskettes also issued)
FAO. 1977. Tropical forage legumes. FAO. Plant Production and Protection Series No. 2. Rome.
FAO. 1980. Useful fodder trees. Emasar Series. Rome.
FAO. 1981. Tropical feeds. FAO Animal Production and Health Series No. 12. Rome. (diskettes also issued)
FAO. 1988. The current state of knowledge on Prosopis juliflora. Eds M.A. Habit & J.C. Saavedra. Rome.
FAO. 1988/89. Nitrogen fixing trees for wastelands. Bangkok, Rome.
ICRAF/ICRISAT. 1992. Faidherbia albida in the West African semi-arid tropics. Ed. R.J. Vandenbelt. Proc. Workshop in Niamey, the Niger, 22–26 April 1991.
IDRC. 1990. Shrubs and tree fodders for farm animals. Ed. C. Devendra. Proc. Workshop in Denpasar, Indonesia, 24–29 July 1989.
IDRC. 1990. Leucaena psyllid: problems and management. Eds B. Napompeth & K.G. MacDicken. Proc. Int. Workshop in Bogor, Indonesia, 16–21 January 1989.
ILCA. 1980. Browse in Africa. The current state of knowledge. Ed. H.N. Le Houerou. Addis Ababa.
MARDI/FAO. 1991. Proc. Int. Livestock-Tree Cropping Workshop in Serdang, Malaysia, 5–9 December 1988. Ed. Z. Ahmad Tajuddin.
MARDI/FAO. 1992. Legume trees and other fodder trees as protein sources for livestock. Eds A. Speedy & P.L. Puglièse. Proc. FAO Expert Consultation at MARDI, Kuala Lumpur, Malaysia, 14–18 October 1991.
Nitrogen Fixing Tree Association. 1980. Leucaena forage production and use. Hawaii, USA.
Nitrogen Fixing Tree Association. 1987. Nitrogen fixing trees. A training guide. Hawaii, USA/Bangkok, Rome, FAO.
Overseas Development Administration. 1993. Use of trees by livestock. NRI Series. Booklets 1–4: Prosopis, Acacia, Gliricidia, anti-nutritive factors. London, UK.
Singh, R.V. 1982. Fodder trees of India. Oxford and IBH Publishing Co. Pvt. Ltd.
Touzeau, J. 1973. Les arbres fourragers de la zone sahélienne de l'Afrique. Toulouse. (Thesis)
Von Maydell, H.J. 1983. Arbres et arbustes du Sahel. Eschborn, Germany, GTZ.
132. Some useful addresses
• for obtaining information on seeds:
CIAT, Centro internacional de agricultura tropical, Apartado Aéreo 6713, Cali, Colombia.
CIRAD-Forêt, Centre de coopération Internationale en recherche agronomique pour le développement, Département Forêt, 45 bis, Avenue de la Belle Gabrielle, 94376 Nogent-sur-Marne Cedex, France.
CSIRO, Australian Tree Seed Centre, Division of Forestry and Forest Products, PO Box 4008 QVT, Canberra 2600, Australia, or Division of Tropical Agronomy, The Cunningham Laboratory, Mill Road, Santa Lucia, Brisbane, Queensland 4067, Australia.
ICRAF, International Centre for Research in Agroforestry, United Nations Avenue, Gigiri, PO Box 30677, Nairobi, Kenya.
IITA, International Institute of Tropical Agriculture, PMB 5320, Ibadan, Nigeria.
ILCA Herbage Seed Unit, International Livestock Centre for Africa. PO Box 5689, Addis Ababa, Ethiopia.
United States Agronomy and Soil Department, University of Hawaii, Honolulu, Hawaii, USA.
• for obtaining information on rhizobia:
CIAT, as above.
CIRAD-Forêt, as above.
CSIRO, as above.
ICRISAT, International Crops Research Institute for the Semi-arid Tropics, Hyderabad, Andhra Pradesh, India.
IITA, as above.
NIFTAL Project, 1000 Holomua Avenue, Paoa, Maui, Hawaii, 96779- 0779, USA.
The Nitragin Company, 3101 W. Custer Avenue, Milwaukee, Wisconsin 53209, USA.
