Vegetable ash in the growth and production of cowpea in the semi-arid region of Piauí. Research, Society and Development, [S. l.], v. 11, n. 5, p. e14011527998, 2022. DOI: 10.33448/rsd-v11i5.27998. Disponível em: https://rsdjournal.org/rsd/article/view/27998. Acesso em: 5 dec. 2025.