Hybrid rice can produce higher yields without needing a lot of nitrogen fertilizer in good soil. The study found that the increased yield from nitrogen fertilizer in hybrid rice was mainly due to the high yield even without the fertilizer. This means that hybrid rice can do well without a lot of extra nitrogen in the soil. It's more important to focus on keeping the soil healthy for sustainable hybrid rice production. Testing hybrid rice without any nitrogen could be a good way to develop high-yielding varieties without needing extra nitrogen in the soil.