How is black soil formed?

The formation process of black soil is influenced by viscous parent material, seasonal frozen soil layer, temporary upper stagnant water and grassland meadow plants, and there is a strong humus accumulation process.

With the change of root distribution, the content of soil organic matter gradually decreased.

In summer and autumn rainy season, the soil moisture is sufficient.

Black soil is a unique treasure endowed by nature to mankind. It is a kind of soil with good properties and high fertility, which is very suitable for plant growth.

Black soil is an important agricultural soil in Northeast China and an important commodity grain and bean base. The cultivation history is short, and the annual cropping system is often implemented. Low terrain, water can also be turned into paddy fields.

In the natural state, the humus layer of black soil can be as thick as 1 m, with rich nutrients and high fertility level, which is suitable for planting dry crops such as spring wheat, corn, soybean, millet, potato and beet.

The black soil in China is located in temperate and semi-humid areas.

The four seasons are distinct, and the same season of rain and heat is its climate characteristic.

The soil parent material is thick and has seasonal frozen soil layer.

It is rainy in summer and autumn, the soil often forms upper stagnant water, and the meadow herbs are lush.

There are only three black soil plains in the world: Mississippi Plain in America, Ukraine Plain in Europe and Northeast Plain in Asia.

The three major black soil regions in the world are the Great Plains of Ukraine, covering an area of about 6.5438+0.9 million square kilometers. The Mississippi River Basin in North America covers an area of about 6.5438+200,000 square kilometers; The black soil area in Northeast China covers an area of about 6.5438+0.03 million square kilometers.