1. Chemical fertilizer has high nutrient content and fast fertilizer effect, but short duration. Organic fertilizer is just the opposite. Mixing organic fertilizer with chemical fertilizer can complement each other and meet the nutrient needs of crops in various growth periods.

2. After chemical fertilizer is applied to the soil, some nutrients are absorbed or fixed by the soil, reducing the effectiveness of nutrients. When mixed with organic fertilizer, the contact surface between chemical fertilizer and soil can be reduced, and the effectiveness of nutrients can be improved.

3. Generally, chemical fertilizer has high solubility, which causes high osmotic pressure on the soil, affecting the absorption of nutrients and water by crops. Mixing with organic fertilizer can overcome this disadvantage and promote the absorption of nutrients and water by crops.

4. If acidic fertilizer is applied to the soil alone, after the fertilizer is absorbed by the plant, the remaining acid roots will combine with hydrogen ions in the soil to form acid, which will lead to increased acidity and aggravated soil compaction. If mixed with organic fertilizer, it can improve the buffering capacity of the soil, effectively adjust the pH value, and prevent the acidity of the soil from increasing.

5. Mixing organic fertilizer and chemical fertilizer can provide vitality to microorganisms, thereby promoting the decomposition of organic fertilizer. The activities of soil microorganisms can also produce vitamins, biotin, nicotinic acid, etc., increase soil nutrients, improve soil vitality, and promote crop growth.