California When it comes to agriculture California has been leading the country for more then 50 years. The agriculture industry generates close to 31.8 billion a year, more then any other state in the country. California’s success is based upon its moderate Mediterranean climate along with its fertile soils and diverse land resources, allowing year-round production of its more then 350 crops. Besides having an ideal climate, the golden state also has a significant degree of irrigation to help maintain its valuable commodities. California leads the nation in the production of wine, with more than 90 percent of all U.S. wine produced in the golden state. If California were a nation it would be the fourth leading wine-producing country in the world.