The study looked at how different levels of nitrogen affected the grain yield of upland rice and paddy rice grown in different ways. They found that high nitrogen levels decreased grain yield for paddy rice but increased it for upland rice. Both types of rice had more productive tillers and different numbers of spikelets per panicle with higher nitrogen levels. Upland rice had fewer roots and lower nitrogen absorption than paddy rice, but it grew faster roots and lost chlorophyll quicker after flowering. Dry cultivation increased the percentage of ripened grains for both types of rice, but decreased grain weight for paddy rice. Overall, the study showed that nitrogen levels and cultivation methods can have different effects on upland rice and paddy rice yields and characteristics.