FERREIRA, Manoel Evaristo; CRUZ, Mara Cristina Pessoa da. Selection of chemical extractors for the evaluation of availability of zinc in soils in the state of São Paulo, Brazil. Pesquisa Agropecuaria Brasileira, [S. l.], v. 27, n. 2, p. 293–304, 1992. DOI: 10.1590/S1678-3921.pab1992.v27.3650. Disponível em: https://apct.sede.embrapa.br/pab/article/view/3650. Acesso em: 10 dec. 2025.