1. Dep. of Geography and Environmental Management Univ. of Waterloo Waterloo Ontario N2L 3G1 Canada
2. Agriculture and Agri‐Food Canada Brandon Research and Development Centre Brandon Manitoba R7C 1A1 Canada
3. Environment and Climate Change Canada Saskatoon Saskatchewan S7N 3H5 Canada
4. Faculty of Agricultural and Food Sciences Univ. of Manitoba Winnipeg Manitoba R3T 2N2 Canada
5. USDA‐ARS, Soil Drainage Research Unit Columbus OH 43210 USA