Although extensive studied, nitrogen management remains a challenger for sugarcane growers, especially the nutrient spatial variability management, which demands the use of variable rate application. Canopy reflectance sensors are being studied, but it seems to saturate the sensor signal when the crop achieves stem heights over 0.6 – 0.7 m. Sugarcane, different from other grasses (poaceae) like winter cereals, presents a linear growth at this stage and is far away from its maturity period when it stores sugar. Eight commercial fields of a Sugar Mill located in the state of São Paulo, Brazil, varying from 16 to 21 ha where monitored during two growing seasons. Conditions varied involving four varieties, soils from sandy to heavy and the previous harvesting occurred in May and October (early and late season), including first to fourth ratoon stages. Each field was scanned with a reflectance canopy sensor three times in the first season (approximately at 0.2, 0.4, and 0.6 m of stem height) and two on the second season (0.3 and 0.5 m), followed by tissue sampling for biomass, crop height and nitrogen uptake on ten spots inside the area, guided by the different values shown by the canopy sensor. As well as the canopy sensor data, the height of the crop presented high correlation with biomass and nitrogen uptake and should be considered as a complementary data to be used to guide nitrogen applications to improve accuracy at late stages of crop growth.