U-S Iowa Senator Chuck Grassley is concerned about foreign ownership with farm ground.  Speaking during his weekly news conference, Grassley says foreign ownership of AMerican farmland jeopardizes both food security and national security.  Grassley says he has been watching a case where a Chinese company is wanting to purchase 300 acres of farmland that sits next to an Air Force base in North Dakota.  The Iowa Republican senator says China is seeking land to feed its growing population.