1. Dep. of Plant Protection, Rural Engineering and Soils, School of Engineering São Paulo State Univ. ‐ UNESP‐FEIS Ilha Solteira São Paulo 15385‐000 Brazil
2. Dep. of Environmental Science State Univ. of Mato Grosso do Sul – UEMS Mundo Novo Mato Grosso do Sul 79980‐000 Brazil
3. Dep. of Crop Science State Univ. of Mato Grosso do Sul – UEMS Cassilândia Mato Grosso do Sul 79540‐000 Brazil
4. Dep. of Soil Science Anhanguera Uniderp Univ. Campo Grande Mato Grosso do Sul 79003‐010 Brazil
5. School of Agricultural Science, Dep. of Crop Science São Paulo State Univ. Botucatu São Paulo 18610‐307 Brazil