Agrium raises Offer for CF Industries - Quick FactsRTT News(rttnews) - Agrium Inc. (AGU: News ,AGU.TO: News ) announced it is substantially increasing its exchange offer to acquire all of the outstanding shares of CF Industries Holdings Inc. (CF: News ) to $85.20 per CF share based on Agrium's closing stock ...Market Report -- In Play (CF) MSN MoneyAgrium sweetens offer for CF Industries Globe and Mailall 20 news articles