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This study was conducted in the municipalities of Guachucal and Cumbal, Nariño department, where the arboreal component presented was characterized in the hedgerows agroforestry system. 20 farms were selected per municipality, which were stratified according to their area, obtaining 3 layers: I (0.5 to 3 ha), II (3.1 to 6 ha) and III (>6 h).Subsequently, a floristic inventory where live fences density per km was evaluated, height, crown area and the index value of importance to know the diversity and abundance of species was made; besides the use that the farmers give to them. Through an ANDEVA, the functionality of live fences was analyzed based on the percentage of soil organic matter and percentage of moisture in pastures. It was found that the average density per km of hedgerows was 415 individuals in Guachucal and 416 individuals in Cumbal. 19 species and families in Guachucal, 8 and 28 species and 12 families were reported in Cumbal. In both municipalities the use that they give to live fences is firewood-wood and poles. The average percentage of organic matter in the soil was 14.9% and humidity in pastures was about 60%, where no significant differences (p>0.05) was found in the municipalities. Producers prefer species such as eucaliptus globulus and cupressus lucitanica; As well as the smaller area farms have a higher percentage of tree cover in live fences, Cumbal presented greater floristic diversity in live fences compared to Guachucal. [ABSTRACT FROM AUTHOR]