Affiliation: | 1. Freshwater Institute, Department of Fisheries and Oceans, 501 University Crescent, Winnipeg, MB, Canada R3T 2N6 and PDK Projects Inc., 365 Wildwood Park, Winnipeg, MB, Canada R3T 0E7;2. Department of Soil Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2 |