Effect of different levels and sizes of walnut seed residues on phosphorus availability and alkaline phosphatase activity in calcareous soil. Baghdad Science Journal, Iraq, Baghdad, v. 19, n. 2, p. 0240, 2022. DOI: 10.21123/bsj.2022.19.2.0240. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/4774.. Acesso em: 6 may. 2024.