[1] Inst Nacl Tecnol Agr, Hilario Ascasubi, Argentina
[2] Univ Nacl Sur, CONICET, Dept Agron, CERZOS, Bahia Blanca, Buenos Aires, Argentina
[3] ARS, USDA, Pullman, WA USA
[4] Commonwealth Sci & Ind Res Org, Agr & Food, Wembley, WA, Australia
[5] Univ Vermont, Dept Plant & Soil Sci, Gund Inst Environm, Burlington, VT 05405 USA
[6] Peter Great St Petersburg Polytech Univ, Dept Appl Math, St Petersburg, Russia
[7] Univ Western Australia, UWA Inst Agr, Crawley, WA, Australia
[8] Palacky Univ, Dept Bot, Fac Sci, Olomouc, Czech Republic
[9] Palacky Univ, Dept Geoinformat, Fac Sci, Olomouc, Czech Republic