The study was carried out in a CIEFOR Puerto Almendra FCF - UNAP plantation, San Juan Bautista, Maynas, Loreto, Peru. The objective was to determine the diameter - total height association and its prediction in the growth of Aspidosperma spruceanum “quillobordon” plants with different doses of foliar fertilization . Plots 5 (band “A1”), 6 (band “F”) and 9 (band “G”) of the plantation were used, with plants without foliar fertilization (control) and plants with foliar fertilization of 40 ml an d 60 ml respectively. The results indicate that the association between diameter and total height for Aspidosperma spruceanum “quillobordon” plants with 40 ml an d 60 ml foliar fertilization and without foliar fertilization, the allometric model that best adjusted was the cubic one; Regarding the association's rating, it was excellent. Regarding the growth of the diameter and hei...