Abstract
The efficiency of use of fertilizer nitrogen (EUN) applied to the leaves of sugar caneis high, reaching 85% when compared to the EUN applied to the soil, an average of 25%.Currently, of the total nitrogen applied to the crop's stalk, about 32% is immobilized byorganic matter and only 25-26% is absorbed by the plant, which demonstrates the lowefficiency of the use of N by sugarcane (Otto e…