Irrigation adjectives are listed in this post. Each word below can often be found in front of the noun irrigation in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing IRRIGATION.
agricultural, artificial, colonic
constant, copious, efficient
extensive, frequent, modern
proper, saline, scale
Hope this word list had the adjective used with irrigation you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.