By Glen Hallick Glacier FarmMedia MarketsFarm – The Canadian dollar dipped Tuesday morning due to gains in its United States counterpart. As of 8:34 am CDT, the loonie was at US$0.7190 or US$1=C$1.3907 compared to Monday’s close of US$0.7197 or US$1=C$1.3895. On the U.S. Dollar Index, the greenback rose 0.287 of a point at 104.440.