adjective. advanced to a more desirable or valuable or excellent state. Opposite of unimproved.

adjective. changed for the better.

adjective. that has been made better; enhanced

verb. Simple past tense and past participle of improve.

adjective. made more desirable or valuable or profitable; especially made ready for use or marketing

adjective. become or made better in quality

adjective. (of land) made ready for development or agriculture by clearing of trees and brush

"Experiments with vertical mulches in gently sloping Vertisols in semiarid India have shown that sorghum stubble packed in trenches 15 cm (6 in) wide improved water infiltration and produced larger yields of grain and straw of an “improved variety” of sorghum, especially in years of drought. 26 Vertical mulch in trenches 30 cm (12 in) deep and 2 m (6.5 ft) apart gave 25 times more grain yield and 2 times more straw yield than the areas without vertical mulches in a very dry year."

better  built  cleared  developed  landscaped  

approved  disapproved  disproved  moved  proved  

advanced  altered  ameliorated  amended  beautified  

improve