1. Department of Agricultural Engineering, Federal Rural University of Pernambuco, Recife, Brazil
2. Academic Unit of Serra Talhada, Federal Rural University of Pernambuco, Serra Talhada, Brazil
3. Brazilian Agricultural Research Corporation, EMBRAPA Semiarid, Petrolina, Brazil
4. Department of Animal Science, Federal Rural University of Pernambuco, Garanhuns, Brazil
5. Agronomic Institute of Pernambuco, Recife, Brazil