Aguilar, Sumiry, Carlos Mestanza, Braulio La Torre, and Berthin Ticona. “Validation Process of the Calcination Method for Determining the Organic Matter Content in Soil Samples from Peru”. Revista Ciencia Agraria 4, no. 2 (May 7, 2025): 7–18. Accessed August 21, 2026. https://revistas.inudi.edu.pe/rca/article/view/171.