1. Soil Science Department, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Piracicaba 13418-900, São Paulo, Brazil
2. Department of Agronomy, Purdue University, West Lafayette, IN 47906, USA
3. College of Grassland, Resources, and Environment, Inner Mongolia Agricultural University, Hohhot 010018, China
4. Brazilian Agricultural Research Corporation—Embrapa, Jaguariúna 13918-110, São Paulo, Brazil
5. Brazilian Agricultural Research Corporation—Embrapa Semiárido, Petrolina 56302-970, Pernambuco, Brazil