Hanfeng Evergreen Inc., a leading provider of slow and controlled release fertilizers in China, announced today that in a statement it has entered into separate agreements with Agrium Advanced Technologies , a business segment of Agrium Inc.,and with PetroChina Ningxia Petrochemical Company , a division of PetroChina Petrochemical Company, to further expand its slow and controlled release fertilizer business in the domestic market in China ...