California almond growers are used to dealing with swings in the weather and water supply. Now they must also grapple with the uncertainty of trade battles as the Trump administration levies tariffs on goods from several countries and weighs adding more to the list. With more than three-quarters of California’s almond crop headed for export, tariffs could impact where the nut is headed and send ripple effects throughout the state’s economy, experts said. The state is the biggest producer of the world’s almonds, accounting for about 80 percent of the global supply. Already, China has responded to Trump’s move by raising tariffs on U.S. almonds — and that’s on top of tariffs levied on the nut in the last Trump administration.