Calamco on July 28 announced new ammonia postings for the California market. Effective Aug. 1, the company’s list price for anhydrous ammonia will drop to $410/st DEL in California, down from the current price of $470/st DEL. Calamco’s aqua ammonia posting will fall to $118/st FOB, down from the current $133/st FOB level, and the company’s AN-20 price in California will move to $270/st DEL on Aug. 1, down from the current $275/st DEL level.