1. Department of Crop Science, College of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, Brazil
2. Center for Tropical Roots and Starches, São Paulo State University (UNESP), Botucatu, Brazil
3. Soils and Environmental Resources Center, Agronomic Institute of Campinas, Campinas, Brazil
4. Department of Soil Science, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, Brazil