1. Soils and Environmental Resources Center, Agronomic Institute (IAC/APTA), Avenida Barao de Itapura, 1481 Botafogo, 13020902 Campinas, SP, Brazil
2. Ribeira Valley Regional Pole (DDD/APTA), Road BR116, km 460, P.O. Box 122, 11900000 Registro, SP, Brazil