Selenium fertilizer can improve rice growth and selenium levels in acidic soil. The study looked at how different amounts of selenium affected soil and plant health. Results showed that selenium application increased rice yield and selenium content. It also changed the types of selenium in the soil, making it harder for rice to absorb. The pH of the soil was affected by selenium application, and the secretion of organic acids by rice roots changed with selenium levels. Overall, the study found that selenium can impact soil and plant health in complex ways.