Maristella Moura Calaço Pessoa, Luís Alfredo Pinheiro Leal Nunes, Ricardo Silva Sousa, Ademir Sérgio Ferreira Araújo, Thiago Vinícius Barros Ibiapina, and Adeodato Ari Cavalcante Salviano, “Physical attributes of yellow oxisol under different monocultures in the savanna of Piauí state, Brazil”, Rev. Bras. Cien. Agra., vol. 13, no. 4, pp. 1-7, Dec. 2018.