1. Univ. Estadual de Maringá (UEM) Campus Universitário, 5790 Av. Colombo 87020‐900 Maringá PR Brazil 87020‐900
2. Agriculture and Agri‐Food Canada Soils and Crops Research and Development Centre 2560 Hochelaga Blvd. Québec QC Canada G1V 2J3
3. Agriculture and Agri‐Food Canada Normandin Research Farm 1468 St. Cyrille Street Normandin QC Canada G8M 4K3
4. Agriculture and Agri‐Food Canada Atlantic Food and Horticulture Research Centre 14 Fundy Dr. Truro NS Canada B2N 5Z3
5. Agriculture and Agri‐Food Canada 32 Main Kentville NS Canada B4N 1J5