Díaz, María Isabel Hernández, Virginia Marrero González, Mayra González Hurtado, Julia Mirta Salgado Pulido, e Anselma Ojeda Velóz. 2008. “Nitrogen Levels and Their Fractioning in Gladiolus Cultivation for Ferralitic Red Soils”. Pesquisa Agropecuária Brasileira 43 (1):21-27. https://doi.org/10.1590/S1678-3921.pab2008.v43.7956.