The development of castor plants (Ricinus communis L.) under nitrogen sidedressing fertilization was evaluated in a randomized block design, constituted by different level of nitrogen sidedressing fertilization (0, 30, 60 and 120 kg ha-1). The sowing was performed on January 27, 2006, comprising three lines of 4 m every plot. The spaces were 0.9 m between lines and 0.45 m between plants. Height and diameter plants, dry matter, yield and oil content were evaluated. The 80 kg ha-1 nitrogen sidedressing fertilization increases the yield and did not alter seed oil content.
Ricinus communis; topdressing; yield; oil content