1. Department of Crop Science, College of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
2. ICL América do Sul, São Paulo, São Paulo, Brazil
3. Midwest Regional/SAA, São Paulo Agency of Agribusiness Technology (APTA), Bauru, São Paulo, Brazil
4. Department of Agricultural Sciences and Technology, School of Agriculture and Enterprise Development, Kenyatta University, Nairobi, Kenya