According to my understanding, "healthy soil" should meet the following conditions:
1. The soil aggregate structure is good, and the soil porosity and permeability are good;
2. Strong soil conservation ability and fertilizer conservation ability;
3. The contents of organic matter, total nitrogen, total phosphorus, total potassium and trace elements such as phosphorus, zinc, manganese and molybdenum necessary for crop growth in the soil are rich and balanced;
4. The soil is not polluted by toxic and harmful substances such as pesticide residues;
5. The soil PH value is moderate, but it is too acidic and too alkaline;
6. The soil layer is deep, which can meet the growth of most crops.
As for the relationship between "healthy soil" and food safety?
Firstly, due to the rich and balanced contents of nutrients such as nitrogen, phosphorus and potassium and trace elements such as phosphorus, zinc, manganese and molybdenum in healthy soil, crops can maintain healthy and balanced growth, and the content of agricultural products formed is more substantial and the quality can be fully guaranteed; Second, crops growing on healthy soil have no chance to contact with toxic and harmful substances, so the produced agricultural products will not cause harm to human body, and the safety is guaranteed.