The researchers studied the best way to fertilize tobacco K326 in order to improve its yield and quality. They found that using 165 kg of nitrogen per hectare resulted in the highest yield and quality of tobacco leaves. A ratio of 60% basal fertilizer and 40% topdressing fertilizer was most effective. Diammonium phosphate was the best topdressing fertilizer, and applying fertilizer in the planting hole was the most successful method.