The study was carried out at the “Puerto Almendra Forestry Research and Education Center (CIEFOR), of the National University of the Peruvian Amazon (UNAP), located on the right bank of the Nanay River, 22 km south-west of the city. from Iquitos, (3° 49' 40" LS and 73° 22' 30" LO), at an approximate altitude of 122 masl, belongs to the “District of San Juan Bautista”, “Province of Maynas”, “Loreto Region” (UNAP, 2019, p.1). The objective was to characterize the soil of Cedrelinga cateniformis (Ducke) Ducke "tornillo" plantations of different ages. The importance of investigating critical soil levels is that these results enable us to make recommendations for corrective measures to improve soil quality. For this reason, the current state of the physical and chemical properties of the soil has been determined, which are similar to those of a natural forest, the pH is extrem...