The researchers studied how spraying mango trees with a mix of nutrients and growth regulators affects fruit growth and quality. They tested different combinations on Amrapali mango trees and found that spraying GA3 30 ppm + KNO3 2% resulted in more fruits, higher fruit retention, and better fruit quality. Another treatment, NAA 50 ppm + KNO3 2%, led to the highest pulp weight. Overall, the combination of GA3 30 ppm + KNO3 2% showed the best results in terms of fruit yield, size, and biochemical composition.