1. USDA‐ARS, PACrops Research Laboratory1701 Centre AveFort CollinsCO80526
2. DAFNAE, Dip. di Agronomia Animali Alimenti Risorse Naturali e Ambiente, viale Univ. 16, 35020 Legnaro (PD)Univ. degli Studi di PadovaPadovaItaly
3. USDA‐ARSPWA Northwest Irrigation and Soils Research Laboratory3793 N. 3600 E.KimberlyID83341
4. USDA‐ARS, PWACrop Improvement and Protection Research1636 East Alisal St.SalinasCA93905