The study looked at the best way to use nitrogen fertilizer on rapeseed plants to increase their yield. They tested different methods on two types of soil and found that applying nitrogen as a base and wintering fertilizer in a 7:3 ratio gave the highest yield. Using 192 kg/ha of pure nitrogen with this ratio resulted in the best balance for high rapeseed yield. This shows that providing enough nitrogen is crucial for the healthy growth of rapeseed plants and can help increase their overall yield.