Thanks to the comments poster on the other Libyan desert farming map for the following links:
http://www.crdp-strasbourg.fr/imageEcole/deserts/hr/image13.jpg
http://web.macam.ac.il/~arnon/Int-ME/me-sat/Kufra%20Oasis%20Libya.jpg
http://www.fas.usda.gov/pecad2/highlights/2004/05/libya/kufrapivots.htm