The present research work determined the necromass and its carbon, in addition, the carbon stored in the soil at different depths of plots I, II, III, IV of the Arboretum "El huayo" of CIEFOR-Puerto Almendra. The methodology applied was to obtain 5 amples of necromass of 1 m2 per plot in total 20 m2 and 3 pits of 70 cm * 70 cm * 30 cm were made for each plot and at depths between 00 cm-10 cm, 10 cm - 20 cm and 20 cm - 30 cm adding a total of 12 test pits and 36 soil samples, to then condition it and determine the organic matter by the calcination method and applying mathematical formulas, calculate the organic carbon by depth level and by plot, taking the accumulation of necromass carbon and soil carbon in t/ha. The results show the highest accumulation of necromass and carbon is found in plot 1 with 9,37 t/ha and 4,69 t/ha respectively, followed by plots 2, 4 and 3. The highest accumula...