How to judge the soil fertility and pH? What type of fertilizer is used in soils of different natures? According to the nature of the soil, different fertilizers are applied and different fertilization methods are used to apply soil fertilization. How can the fertilization capacity, nutrient, acidity and alkalinity soil be effectively fertilized?
The most basic and effective method is:
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 one fertilization is more, the nutrients will not be lost. On the contrary, if the soil is sandy and the organic matter content is small, the fertilizer-retaining capacity is correspondingly weak. In this soil fertilization, the amount should not be too much, and a small amount should be used several times to avoid the loss of nutrients and waste.
However, the characteristics of soil fertility are also different. Some fertilizers are long and stable. This kind of soil is “too hungryâ€. One fertilization can be more, the number can be less; the early development with insufficient stamina and lack of stamina Tian, ​​should pay attention to the late fertilization of crops; late hair fields with stamina and lack of strength should pay attention to 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 directly or indirectly related to the former crop. Generally speaking, if the former crop is a bean crop or a green manure, the nitrogen in the soil is more, and phosphorus should be added. Potassium fertilizer, if the previous crop is a grass crop such as rice or wheat, the nutrient consumption in the soil is more, and nitrogen, phosphorus and potassium fertilizers, especially nitrogen fertilizer, should be added.
3, the acidity and alkalinity of the soil will affect the effect of fertilization, and the application of chemical fertilizers will affect the acidity and alkalinity of the soil. Acidic soil should choose alkaline fertilizer, such as ammonia water, ammonium bicarbonate, calcium magnesium phosphate fertilizer, etc., alkaline soil should choose acidic fertilizer, such as superphosphate, ammonium sulfate, etc., so as to avoid the soil becoming too acidic or too alkaline, and Conducive to the absorption and utilization of nutrients by crops.
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