Former Potash Corp. of Saskatchewan Inc. executive James Dietz Jr. has joined Rentech Nitrogen Partners LP’s general partner’s board of directors. Dietz has over 41 years of experience in the fertilizer and chemical industries, most recently serving as executive vice president and COO of PotashCorp from November 2000 until he retired in June 2010. While at PotashCorp he was responsible for the company’s worldwide operations, as well as procurement functions and its safety, health, and environment performance. Dietz previously served as president of PotashCorp Nitrogen, and held other executive positions at PotashCorp Nitrogen and its predecessor company, Arcadian Corp. He received a B.S. and an M.S. in Chemical Engineering from The Ohio State University.