1. Professor at the School of Agronomy of the Federal University of Goiás, Goiânia, Brazil
2. Plant Nutrition Laboratory, School of Agronomy, Federal University of Goiás, Goiânia, Brazil
3. Agronomist, School of Agronomy, Federal University of Goiás, Goiânia, Brazil
4. Postgraduate in Program in Agronomy, with Concentration Area in Soil and Water, School of Agronomy, Federal University of Goiás, Goiânia, Brazil