Alcântara Pereira, R. and Dantas Neto, J. 2014. AGRO-PASTORAL ACTIVITIES EFFECT ON THE PHYSICAL AND CHEMICAL ATTRIBUTES OF THREE CLASSES OF SOILS OF A WATERSHED IN THE BRAZILIAN SEMIARID - DOI 10.5216/bgg.v34i1.28645. Goiano Bulletin of Geography. 34, 1 (Apr. 2014), 169–188. DOI:https://doi.org/10.5216/bgg.v34i1.28645.