1. Univ. of HohenheimInstitute of Crop Science, Agronomy (340a)Fruwirthstr. 2370593StuttgartGermany
2. Univ. of HohenheimInstitute of Crop Science, Biostatistics (340c)Fruwirthstr. 2370593StuttgartGermany
3. Univ. of KentuckyDep. of Plant and Soil SciencesLexingtonKY40546‐0312