1. Interdisciplinary Research Group on Environmental Biogeochemistry (IRGEB), Department of Soil Science, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
2. Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, USA
3. Integrar Research Company, Capivari do Sul, RS, Brazil
4. Research, Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul (IFRS), Porto Alegre, RS, Brazil
5. Department of Soil Science, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil