1. Unidad Integrada Balcarce EEA INTA Balcarce‐ Fac. Ciencias Agrarias (UNMdP) Ruta 226 km 73.5 Balcarce Buenos Aires Argentina
2. Consejo Nacional de Investigaciones Científicas y Técnicas
3. Dep. of Agronomy Kansas State Univ., 2004 Throckmorton Plant Science Center Manhattan KS 66506
4. Dep. of Agricultural Engineering Federal Univ. of Santa Maria, Rural Science Center Santa Maria RS Brazil
5. CCGL Group‐ Research and Technology RS 342, KM 149 98005‐970 Cruz Alta RS Brazil
6. DuPont Pioneer 7100 NW 62nd Ave. Johnston IA 50131