The two basic approaches are
Websites of some organizations (in alphabetical order) whose main area of interest is arid-zone agriculture:
Pleistocene Settlement in the Australian Arid Zone: Occupation of an Inland Riverine Landscape in the Central Australian Ranges
Mar 01, 1998; Recent excavations at the Kulpi Mara Rockshelter in the Palmer River catchment of central Australia have produced radiocarbon...
FORESTS IN ARID ZONES NEED PROTECTION, SAYS UN CONVENTION TO COMBAT DESERTIFICATION MESSAGE FOR WORLD ENVIRONMENT DAY 2011 FROM LUC GNACADJA, EXECUTIVE SECRETARY OF THE UN CONVENTION TO COMBAT DESERTIFICATION.
Jun 06, 2011; BRUSSELS, Belgium -- The following information was released by the United Nations Environment Programme (UNEP): arid zone...