1. Federal Technological University of Paraná, (UTFPR) Medianeira Paraná Brazil
2. Federal Institute of Southeast of Minas Gerais Barbacena Minas Gerais Brazil
3. University of Brasília (UnB), PPGCA/FUP Planaltina, Distrito Federal Brazil
4. Soil Science Department Federal University of Lavras (UFLA) Lavras Minas Gerais Brazil