Calgary-Canadian Pacific Railway recently said potash shipments are off 50 percent quarter-to-date, though August was a little better than the first six months of the year. “So far, September is a little quieter, and we just don’t know when this market is going to break,” CPR President and CEO Fred Green told analysts at the Dahlman Rose & Co. Global Transportation Conference Sept. 9. However, he noted that once it does, it will come back in pretty substantive numbers, which could cause quite a bump in CPR statistics. Green termed the sulfur market as “very difficult,” and said not much volume has been moving, with more and more of the product going to block. Overall, CPR is yet to see its traditional fall peak in railcar volumes. Green said that while grain movement has been good, overall volumes are off 20 percent. He also cited fears that retailers may not be rushing to get merchandise stocked for Christmas this year.