1. Agriculture and Agri-Food Canada, 6337, Saskatoon, Saskatchewan, Canada, ;
2. University of Saskatchewan, Soil Science, 51 Campus Drive, Saskatoon, Saskatchewan, Canada, S7N 0B4, , ;
3. Integrated Crop Management Services, Saskatoon, Saskatchewan, Canada, ;
4. Agrimetrix Research and Training, Saskatoon, Saskatchewan, Canada, ;