Modern urban gardens are different from vast rural cultivated land. Because the garden soil is basically backfill soil, either yellow soil crushed by vehicles or mixed with countless construction wastes, and many gardens are underground garages with no ecosystem at all. It is impossible to let the land lie fallow for half a year to restore fertility like in rural areas.
So there is no way to change the soil, so it is imperative to improve the soil.
Healthy soil should be loose, air-permeable and water-permeable, and there are a large number of organisms visible to the naked eye, such as earthworms, which are considered as millions of invisible microorganisms.
Soil improvement is a complex, slow and comprehensive process of physics, chemistry and biology. But what we can do at once-improve the physical structure of soil to make it loose, breathable and permeable.
The first step is to turn over the soil and pick up all the construction waste and stones, at least 20 cm thick. If you have the energy, you'd better turn to 30 cm.
The second step is to clean up the unnecessary trees, shrubs and weeds in the yard, dig out the roots and clean them up to prevent them from growing again in the later stage.
Step 3: The clods are dried and broken, and then sand, rice husk charcoal, sawdust, grass clippings, etc. are added. , rice husk charcoal, plant ash, have a very good effect on improving soil hardening, but will lead to soil alkalescence, so the dosage should be cautious. Finally, after the structural improvement is completed, it is necessary to cultivate the soil that microorganisms and earthworms like, because nature is the best composting expert. Everyone knows that earthworms can drill around to loosen the soil and let air and water enter the deep soil. Earthworm dung is still a good fertilizer. What does this have to do with microorganisms? Because microorganisms absorb nutrients from the soil and store them in the body, they concentrate around the roots of plants and are absorbed by plants. Therefore, the continuous supply of organic matter will attract a large number of microorganisms, earthworms and other organisms to actively join the team of land reform, thus bringing about a virtuous circle.