World Ag Expo in Tulare, Calif.
Dirk Lenie, vice president of global marketing for Lindsay International, demonstrates wireless irrigation management software aimed at helping farmers use less water at the 2014 World Ag Expo in Tulare, Calif. (Al Seib / Los Angeles Times)
Edwin T. McFadden III, left, and wife Viki McFadden, who farm 500 acres of citrus and avocados in Fillmore, Calif., talk with Mark Clifton of Jain Irrigation Inc. about a drip watering system. (Al Seib / Los Angeles Times)
Rich Berry, operations manager at Advanced Water Well Services, looks through a corrugated liner used to repair breaks and holes in wells that are sometimes the result of dropping water levels. (Al Seib / Los Angeles Times)
Ken DeVries, left, a farmer and dairyman near Barstow, inspects irrigation systems at the Rain for Rent display at the 2014 World Ag Expo in Tulare, Calif. (Al Seib / Los Angeles Times)
At the 2014 World Ag Expo in Tulare, Calif., more than 1,400 exhibitors demonstrate products for the agricultural industry. (Al Seib / Los Angeles Times)