The study looked at how different types and amounts of organic fertilizer affect the quality of tobacco leaves. They found that using methane water as a topdressing improved tobacco plant growth. Using 7,500 kg/hm^2 of barnyard manure as a base fertilizer resulted in the highest tobacco output and value. Compared to using compost, using barnyard manure increased output and value by 14.4% and 16.5%, respectively.