FAO - Cactus Pear as Forage (Technical Bulletins)
http://www.fao.org/WAICENT/FAOINFO/AGRICULT/AGP/AGPC/doc/pasture/CACTUS.HTM
Cactusnet Newsletter 2000
http://www.data.fao.org/WAICENT/FAOINFO/AGRICULT/AGP/AGPC/doc/publicat/Cactusnt/cactus0.htm
Development of Sustainable Agriculture in Arid Regions of Chile - Paper on “Prickly pear (Opuntia ficus-indica) utilization as a feed for ruminants”
http://ag.arizona.edu/OALS/oals/proj/linkages/cactus/feed.html
IPGRI - An ethnobotanical inventory
http://www.ciat.cgiar.org/ipgri/fruits_from_americas/frutales/Ficha%20Opuntia%20ficus-indica.htm
Paper on “Controle de plantas daninhas na cultura da palma forrageira (Opuntia ficus-indica, Mill.)”
http://www.sbz.org.br/eventos/PortoAlegre/homepagesbz/For%5CFOR146.htm
FAO Electronic Conference - Paper on “The Prickly Pears (Opuntia spp., Cactaceae)”.
Paper on Biological Control of Opuntia stricta in the Kruger National Park
http://www.parks-sa.co.za/knp/scientificservices/hoffmann%20opuntia.html
Environmental Affairs Office, Washington State USA - Opuntia fragilis
http://www.wsdot.wa.gov/eesc/environmental/programs/culres/ethbot/m-p/Opuntia.htm
Arizona - Index of Prickly Pears
Paper on “Evaluation of leucaena and cactus pear as forage resources for rabbits”
Value and Use of Opuntia polyacantha
http://www.fs.fed.us/database/feis/plants/cactus/opupol/value_and_use.html
FAO electronic conference - Paper on “Opuntia-based ruminant feeding systems in Mexico”
Paper on “Plains Prickly pear: relation to grazing intensity and blue grama yield on central great plains”
Native cultivars of cactus pear in Mexico
http://www.hort.purdue.edu/newcrop/proceedings1996/v3-446.html
FAO - a paper on “Opuntiae: a strategic fodder and efficient tool to combat desertification in the WANA region
http://www.fao.org/ag/AGP/AGPC/doc/PUBLICAT/Cactusnt/cactus2.htm
Cactus homepage of Texas A & M University, including use as forage
Paper on “Efeito da adubação e de nematicida no crescimento da palma forrageira cv. Gigante
http://www.sbz.org.br/eventos/PortoAlegre/homepagesbz/For%5CFOR172.htm
Prickly Pear Cactus Control
http://www.aginfonet.com/agricarta/content/grazing_pasture_technology/prickly_pear.html
Famine Food Field Guide - Opuntia ficus-indica
http://www.telecom.net.et/~undp-eue/faminefoodweb/category1/cat1_Opuntia_sp_ok.htm
Programa de investigación y servicio en nopal
