Peruvian carrots is an excellent alternative for small and medium farmers, especially within the concepts of family farming. Thus the aim of this study was to evaluate the agricultural economic yield of this crop when managed under two plant spacing arrangements (20 and 25 cm between plants) and different application methods of dried broiler manure on the soil [surface-applied (10 t ha-1); incorporated to the soil (10 t ha-1); surface applied (5 t ha-1) + incorporated (5 t ha-1)]. Two harvests were performed in different stages of maturation, when plants presented 50% and 70% senescence, at 224 and 249 days after planting (DAP), respectively. The characteristics evaluated were not significantly influenced by the interaction between the plant spacing arrangements and the methods of broiler manure addition, although they were influenced by isolated studied factors. Greater fresh weights of leaves, crown and shoots were obtained under 25 cm plant spacing arrangement in both harvests: there were increases of 27% (leaves), 28% (crowns) and 37% (shoots) for 50% senescence; and 25% (leaves), 13% (crowns), 18% (shoots) and 22% (commercial roots) for 70% senescence, when compared to those obtained under 20 cm. With 70% senescence, the greatest yields of commercial roots were attained when the addition of broiler manure was incorporated on the soil or surface applied + incorporated, outgrowing 10.27 ton ha-1 and 7.29 ton ha-1, respectively, in comparison with those produced without manure. Thereby, to achieve greatest yield of commercial roots and higher net income, the Peruvian carrot crops should follow spacing of 25 cm between plants, with broiler manure incorporated to the soil, as well harvests performed when plants reach 70% senescence, at 249 DAP.
