1. Department of Crop Sciences, Institute of Agronomy, University of Natural Resources and Life Sciences Vienna (BOKU), Tulln, Austria
2. Experimental Farm Groß-Enzersdorf, Department of Crop Sciences, University of Natural Resources and Life Sciences Vienna (BOKU) Groß-Enzersdorf, Austria
3. Institute of Crop Production, University of Agriculture Cracow, Cracow, Poland
4. Department of Agroecosystems, Faculty of Agriculture, University of South Bohemia, České Budějovice, Czech Republic