With too much increase in nitrogen application, sugar content in juice is

An increase in the application of nitrogen content in sugarcane fields may lead to increased yield but the sugar content in sugarcane juice decreases.
The reduction in sucrose percentage accompanied by the increase in Nitrogen levels may be due to increased water retention in millable cane leading to a reduction in sucrose determined as a percentage of stalk fresh weight.
Whereas Nitrogen is a key restrictive factor for continuous sugarcane output in terms of yield.