TY - SER AU - Rosa,H.J.A. AU - Amaral,L.R.do AU - Molin,J.P. AU - Cantarella,H. TI - Sugarcane response to nitrogen rates, measured by a canopy reflectance sensor KW - CANA DE ACUCAR KW - ADUBACAO KW - NITROGENIO KW - AGRICULTURA DE PRECISAO ER -