Jose Alvarez, a supervisor at R. H. Dupper Landscaping, stood up from changing a sprinkler nozzle on a large grassy field at a homeowner’s association (HOA) in Chandler, Arizona. He surveyed the turf, a patchwork of green and brown.  “It looks terrible,” he said. “The sprinklers, they don’t have enough pressure, and they spray, like, a little bit.” He noted the rings, like miniature crop circles, created by uneven watering.    Read the article………………