Madrigal-Valverde, Ángel, and Gabriel Garbanzo-León. 2018. “Use of Industrial Waste in Prenursery Stage of Oil Palm (Elaeis Guineensis, Arecaceae) Production: Growth and Nutrient Uptake”. UNED Research Journal 10 (2):257-66. https://doi.org/10.22458/urj.v10i2.2157.