Commentary As much as 18 percent of all the land growing table food for consumption by Americans is at risk due to poor water management policies. The root causes of the potential food crisis are many. Kelly Malloy, director of strategic services at an urban water district in Southern California, said that literally “every drop of water in Southern California has been litigated and is accounted for.” According to the California Department of Water Resources, 50 percent of surface water is used for environmental purposes, 40 percent for agriculture, and 10 percent for urban use. Although a significant portion of California’s water supply is used for agriculture, it’s not being used wastefully, said agriculturalist Steve Jackson. “Farmers are among the strongest environmentalists on earth,” said Jackson, who is a member of eight water boards. “We live in the dirt and work with trees and plants for a living. If we …