With the objective of evaluating the effect of nitrogen on agronomic characteristics of cassava (Manihot esculenta Crantz), an experiment was conducted at the State University of Southwestern Bahia (UESB), Vitória da Conquista, Bahia, Brazil. In the experiment, conducted in the field, the application of six doses of nitrogen (0, 50, 100, 200, 300 and 400 kg ha-1 N) was studied in two varieties of cassava (Sergipe and Lisona), adopting a randomized block experimental design, with treatments in a factorial arrangement. The results demonstrate that nitrogen affected height of plants, production of aerial parts of the plants, tuber yield, dry matter and starch contents in roots, and flour yield. Number of shoot per plant, harvest index, and leaf area index were not affect by nitrogen. Sergipe variety showed greater results than Lisona variety for aerial part and tuber yield, root dry matter, root starch production and flour yield.
fertilizer; yield; starch production
