1. Arid zone definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation

2. Nearly two-thirds of the arid zone stations have annual totals between 225 and 275 mm (8.9 and 10.8 in).

3. Dedicated to providing quality trees to the Landscape Industry that are appropriate to the Desert Southwest.Trees for Beautiful Southwestern Landscapes from Arid Zone Trees can be found in the West's premiere landscapes (Arizona, California, Nevada, Texas) on golf courses, commercial, municipal, and residential landscape projects, Azt offers landscape professionals, landscape contractors and