raw matter

secondary matter

Atmosphere enters oxygen, nitrogen

Carbon dioxide and water vapor are produced inside the soil

Intergranular moisture and various soluble substances dissolved in it

Bacteria, actinomycetes, fungi and algae

Invertebrates

Basic material that makes up soil minerals and provides essential nutrients to plants

Influence the direction and process of physical, chemical and biological effects in soil

The most important factor in soil formation. Soil can only be formed after organisms appear on the basis of the parent material

Affects the redistribution of heat and water; affects the distribution of parent material

The longer the time, the greater the change in soil properties.

The most profound influencing factor in the soil formation process, by changing a certain soil formation factor Or the contrasting relationship between various factors to control the soil formation process and direction

More in clay soils, less in sandy soils and well-structured soils

Pores that retain capillary moisture

refers to the passage of soil moisture and air

soil properties

The influence of element content ratio

Bioremediation

chemical additives

agronomic measures

Apply amendments

Hakka

water washing method

electrochemical method

Thermal desorption method

Bioremediation

Mainly applicable to nature reserves specified by the state (except those with high original background heavy metal content), Soil from centralized drinking water sources, tea gardens, pastures and other protected areas, Soil quality remains essentially at natural background levels.

I is mainly suitable for general farmland, vegetable fields, tea gardens, orchards, pastures and other soils. Soil quality basically does not cause harm or pollution to plants and the environment.

It is mainly suitable for forest soil, high background value soil with large pollutant capacity and farmland soil near minerals (except vegetable fields). Soil quality basically does not cause harm or pollution to plants and the environment.

It is a limit value to protect the natural ecology of the region and maintain the soil environmental quality of the natural background.

It is the soil limit value to ensure agricultural production and maintain human health.

It is the soil critical value to ensure agricultural and forestry production and normal plant growth.

diffusion

mass flow

pesticide

soil

Physical relocation

Physicochemical migration and chemical migration

biological migration