This research study was carried out in the Pabloyacu research and Production Center; belong to the San Martín National University, Ecology Faculty, Moyobamba district, Moyobamba province, San Martín Department. lt had as principal aim: To evaluate the dendroJogicas characteristics of the pioneering species of the area recovered of the Pabloyacu Center of Prod'uction and lnvestigation, and as specific aims: a) To identify the pioneering species in the area ofstudy. b) To determine the dendrologicas associations between sowed species and pioneering species. e) To determine the biometric characteristics of the pioneering species of the recovered area. d) To evaluate the influence of the soil in the development and growth of the pioneering species of the are a of study. e) To determine the environmental value of pioneering species in areas recovered of the Pabloyacu Center of Production an...