1. Campus Petrolina, University of Pernambuco, Petrolina 56328-900, Pernambuco, Brazil
2. Embrapa Semi-arid, Petrolina 56302-970, Pernambuco, Brazil
3. Foundation for the Support of Science and Technology of the State of Pernambuco (FACEPE), Recife 50720-001, Pernambuco, Brazil
4. Federal Institute of Sertão Pernambucano, Campus Petrolina, Petrolina 56302-970, Pernambuco, Brazil