Evaluation of the effect of biofertilizer application on primary production in pennisetum grasses (purple king grass and iniap 811), at 3 harvesting ages. investigacionysaberes. 2023;13(2):1-12. Accessed July 8, 2025. http://www.revistasdigitales.utelvt.edu.ec/revista/index.php/investigacion_y_saberes/article/view/220