Assessment of soil moisture by family farmers under multi-cropping systems in a semiarid region - Girão, Ana Leônia de Araújo; Oliveira, Renato Teixeira de; Ferreira, Tiago Osório; Ortiz-Escobar, Maria Eugenia; Miranda, Fábio Rodrigues de; Oliveira, Teógenes Senna de (Agroecology and Sustainable Food Systems, 2015)