High summer in Mercer County is a wall of green corn and a sky with nothing in it to break the sun, so a yard with shade becomes the most valuable ground on the property. Advanced Oasis spends those long afternoons keeping that ground worth sitting in — mowing, trimming around trees and beds, edging the walks, sweeping the cuttings away. The work follows the heat: start early, take the open lawns first, save the shaded lots for the middle of the day. By evening the grass is cut and quiet and somebody's chairs go back out on it. That is the whole ambition, honestly, and it is a good one.