1. The soil fertility and fertilization characteristics have a great influence on the fertilization effect. Where the soil is relatively heavy, the organic matter content is relatively high, and the fertility is relatively strong. Even if the fertilization is more than once, the nutrients are not lost, but the soil fertilization characteristics are also different, and some fertilizers are long and stable. It is "too hungry", one more fertilization can be more, the number can be less; there are early-onset fields with insufficient near-term and stamina, should pay attention to the late fertilization of crops; late-fields with stamina and lack of strength should pay attention Early fertilization.
2. The amount of various nutrients in the soil is the main basis for determining which fertilizer to apply and how much to apply. The nutrient status in the soil is not only related to the parent material of the soil, but also has a direct or indirect relationship with the former crop.
3. The acidity and alkalinity of the soil will affect the effect of fertilization, and the applied chemical fertilizer will affect the pH of the soil. The acidic soil should be selected from acidic fertilizers such as superphosphate and ammonium sulfate. This will prevent the soil from becoming too acidic or too alkaline, and will be beneficial to the absorption and utilization of nutrients by crops.