The above is a clip from “Greening the Desert” with Geoff Lawton, located in Jordan.
Documentary about turning around and regaining land lost to desertification. Geoff helps turn a baron desert into a thriving forest. He talks us through the process of transforming the desert ground via processes that included things like desalination (desalting soil), water retention via swales, heavy mulching, planting legumes and many other things and they basically end up building top soil and in turn fertility.
This is the full documentary on the subject by Geoff: http://www.youtube.com/watch?v=xzTHjlueqFI
Also check out this Dutch Documentary “Green Gold” about a guy called John Liu who documented the Chinese rehabilitating large scale damaged eco systems (the size of the Netherlands), effectively stopping desertification:
John Liu’s full documentary that the above discusses, “Hope in a Changing Climate”: