 From the Ag Information Network, this is your agribusiness update. California farmers are working to reduce impacts of summer heat that's increased their costs and jeopardized production. With triple-digit temperatures pummeling the state's key agricultural regions, topping 100 degrees in some areas, farmers are irrigating fields more frequently, deploying misters and fans to cool livestock, and shortening daytime work or working after sundown. Some dairy farmers say milk production can drop 15 to 20 percent during peak heat days.