Compound fertilizer refers to two or two kinds of chemical fertilizers, compound fertilizer has high nutrient content, low accessory composition and good physical character, it is very important to balance fertilization, improve fertilizer utilization rate and promote the high and stable yield of crops.

But it also has some drawbacks, such as its nutrient ratio is always fixed, and different soil, different crops to the nutrient types, quantities and proportions are diverse. Therefore, it is best to test soil before use, to understand the texture and nutritional status of soil in the field, but also to pay attention to the combination of fertilizer with the unit to get better results.