There are mainly first, second, third and fourth grades of soil, which refer to the first-class farmland soil, the second-class farmland soil, the first-class farmland soil and the fourth-grade farmland soil. These levels are divided according to factors such as soil fertility, permeability, drainage, etc.
Fertility is higher:Grade 1 farmland soil is the most fertile soil, rich in nutrients, suitable for the growth of a variety of crops.
Good water permeability:It has good water permeability and avoids waterlogging.
Good drainage:It has good drainage and avoids overly wet soil.
Moderate pH:The soil pH is moderate, which is suitable for the growth of most crops.
High content of organic matter:It is rich in organic matter and helps to maintain the fertility of the soil.
Secondary Farmland Soil:
Moderate fertility:The soil fertility of the secondary farmland is moderate, which is suitable for the growth of most crops.
Water permeability is average:The permeability is slightly worse than that of first-class farmland soil.
Drainage is average:Drainage is average, and may be slightly damp when there is a lot of rain.
Moderate pH:The soil pH is moderate, which is suitable for the growth of most crops.
Moderate organic matter content:The organic matter content is moderate and can provide the right amount of nutrients.
* Farmland soil:
Fertility is low:**Farmland soil fertility is low and organic or inorganic fertilizers may need to be applied.
Poor permeability:Water permeability is poor, and there may be water accumulation problems.
Drainage is average:The drainage is average, so you need to pay attention to the drainage.
Moderate pH:The soil pH is moderate, which is suitable for the growth of most crops.
Low in organic matter:The organic matter content is low, and the nutrients** for plant growth are more limited.
Grade 4 Farmland Soil:
Low fertility:Grade 4 farmland has the lowest soil fertility and usually requires a lot of fertilizer application to meet the needs of the crop.
Poor permeability:Poor water permeability and easy to accumulate water.
Poor drainage:Drainage is poor, and measures need to be taken to improve drainage.
Moderate pH:The soil pH is moderate, which is suitable for the growth of most crops.
Low in organic matter:The content of organic matter is low, which has a greater impact on the growth of plants.
These levels are mainly to guide rational agricultural production under different soil types, and to facilitate scientific fertilization, selection of suitable crops and appropriate land management measures.