Ortega Monsalve, Manuela, Mario Fernando Cerón-Muñoz, and Marisol Medina-Sierra. “Use of Near Infrared Spectroscopy for the Determination of Organic Matter and Total Nitrogen of Soils”. Ciencia En Desarrollo 14, no. 1 (March 2, 2023): 111–118. Accessed April 19, 2025. https://revistas.uptc.edu.co/index.php/ciencia_en_desarrollo/article/view/13942.