Researchers compared the effects of chicken manure and chemical fertilizer on rice growth and nutrient levels. They found that both fertilizers had similar results in terms of grain and straw yield, as well as nutrient concentrations in the rice seeds. Chemical fertilizer produced slightly higher yields, but chicken manure was a safe and effective alternative. This suggests that chicken manure can be used as a sustainable option for rice farming, either on its own or in combination with chemical fertilizer.