Basantes Morales, Emilio, et al. “Effect of Fertilization and Agricultural Amendments on the Quality of a Prairy Established on a Volcanic Soil, Andosol”. International Journal on Advanced Science, Engineering and Information Technology, vol. 12, no. 6, Nov. 2022, pp. 2491-8, doi:10.18517/ijaseit.12.6.17102.