Supporters say a ballot proposition designed to make it easier to swap rather than sell or lease state trust land would help faciliate agreements that preserve military installations.

Thanks to $23 million from a fund Arizona voters created in 1998 to preserve open spaces, Scottsdale plans to add about 2,000 acres of state trust land here to the McDowell Sonoran Preserve. To Bahr, director of the Sierra Club’s Grand Canyon Chapter, it’s money well spent.