CF Industries Holdings Inc. has announced that it has entered into long-term ammonium nitrate supply agreements with Orica International Pte. Ltd. and Nelson Brothers LLC, a joint venture between an Orica affiliate and Nelson Brothers Inc. Under the terms of the related agreements, CF has committed to supply between 700,000 to 800,000 tons of industrial grade ammonium nitrate and ammonium nitrate solution on an annual basis for a period of at least 10 years beginning Jan. 1, 2017. CF says the agreements account for 70 percent of the annual AN capacity at its Yazoo City Nitrogen Complex in Mississippi. Product prices will be tied to natural gas prices.