Wiktionary
unirrigated
a. Not irrigated.
Usage examples of "unirrigated".
From irrigated lands the yields are, of course, much more uniform than from unirrigated lands, since in the former the supply of moisture may be controlled.
The seed grown in such areas is larger and more attractive to the eye than that ordinarily grown in the absence of irrigation, and because of this many are lured into sowing it on unirrigated land when the former would better serve their purpose.