Gutiérrez, F., Loayza, C., Portilla, A. and Espinosa, J. 2018. Nitrogen level on biomass accumulation, bromatological composition and nitrogen use eficiency of Avena sativa. Siembra. 5, 1 (Dec. 2018), 071–078. DOI:https://doi.org/10.29166/siembra.v5i1.1428.