Crop water stress index for a medicinal plant (Baccharis crispa Spreng.) under variable irrigation levels - Moreno-Pizani, Maria A; Farias-Ramirez, Asdrubal J; Barros, Timóteo H. S; Zucolotto, Juliana; Marques, Patricia Angélica Alves; Coelho, Rubens Duarte (Water Resources and Irrigation Management, 2018)