The researchers studied how different fertilizers affect the growth and yield of Kinnow fruit trees. They tested various combinations of organic and chemical fertilizers on the plants. The treatment with a mix of NPK, FYM, and biofertilizers resulted in the best outcomes, including taller plants, more flowers, heavier fruits, and better fruit quality. This combination led to increased fruit yield per plant, higher pulp weight, and improved taste characteristics like sweetness and acidity.