TSP March 23, 2018Market Watch, Triple Superphosphate, U.S. Gulf, Western Cornbeltmickeybarb@charter.net U.S. Gulf: The TSP market was quoted at $315-$325/st FOB,This content is restricted to site members. If you are an existing user, please log in. If you would like to Subscribe please go to the 'Subscribe' area from the main menu.