1. Univ. of Natural Resources and Life Sciences, Vienna, Dep. of Crop Sciences, Experimental farm Gross‐Enzersdorf Gross‐Enzersdorf Austria
2. Univ. of Natural Resources and Life Sciences, Vienna, Dep. of Crop Sciences, Institute of Agronomy Tulln an der Donau Austria
3. Univ. of Natural Resources and Life Sciences, Vienna, Dep. of Crop Sciences, Institute of Plant Protection Tulln an der Donau Austria
4. Univ. of Hohenheim Institute of Crop Science, Biostatistics Unit Stuttgart Germany