Coelho, E.F., Melo, D.M. de, Pereira, B.L. da S., Santos, D.B. dos and Rosa, R.C.C. 2016. <b&gt;Roots of ‘BRS Princesa’ banana fertigated with humic substances and saponin-based plant extracts. Acta Scientiarum. Agronomy. 38, 4 (Sep. 2016), 521-528. DOI:https://doi.org/10.4025/actasciagron.v38i4.30790.