The study looked at how using rabbit manure and biochar made from chicken manure affects the growth and yield of pakchoy plants. They tested different amounts of both types of manure to see the impact. The results showed that using rabbit manure didn't have much effect, except for increasing the weight of the roots. But using biochar from chicken manure increased the yield of the plants by almost 24% compared to not using any biochar. Overall, using biochar from chicken manure at a high dose gave the best results for growing pakchoy plants.