The study looked at how different types of upland rice grow in shaded conditions. They used a specific design to test different levels of shading and rice varieties. The results showed that less light from shading made the rice plants shorter, with fewer tillers and delayed flowering, leading to lower grain yield. Some rice varieties did better than others in certain aspects, like plant weight and panicle numbers. Overall, the amount of shade and the type of rice both had an impact on how well the rice plants grew and produced grains.