Parra C. A, Gamboa J. J. FRACCIONAMIENTO DEL CALCIO EN SUELOS VOLCANICOS DEL ALTIPLANO DE IPIALES / CALCIUM FRACTIONATION IN THE VOLCANIC SAILS OF THE HIGHLANDS OF IPIALES, COLOMBIA. rcia [Internet]. 1972Jan.1 [cited 2024May15];4(1). Available from: https://revistas.udenar.edu.co/index.php/rfacia/article/view/1406