Balanced fertilization helps increase soybean yield and soil nutrient efficiency. The study looked at soybean growth in Heilongjiang Province with different nutrient treatments. Balanced fertilization improved soybean yield in certain areas and helped plants absorb nutrients better. Nitrogen and potassium levels should be increased, while phosphorus levels should be decreased in these regions. The study found that specific amounts of N, P, and K fertilizers are needed for optimal soybean growth, depending on the region.