improved as in made more desirable or valuable or profitable

• "especially made ready for use or marketing"
• "new houses are springing up on an improved tract of land near the river"
• "an improved breed"

improved as in become or made better in quality

• "was proud of his improved grades"
• "an improved viewfinder"

improved as in (of land) made ready for development or agriculture by clearing of trees and brush

• "improved farmlands"