What are characteristics of black soil?
What are the characteristics of black soil?
- Clayey texture and are highly fertile.
- Rich in calcium carbonate, magnesium, potash, and lime but poor in nitrogen and phosphorous.
- Highly retentive of moisture, extremely compact and tenacious when wet.
- Contractible and develops deep wide cracks on drying.
What is the black cotton soil?
Black cotton soil is heavy clay soil, varying from clay to loam; it is generally light to dark grey in colour. Cotton grows in this kind of soil. The soil prevails generally in central and southern parts of India.
What is black cotton soil made of?
Chemically black soils are made of lime, iron, magnesium, alumina, and potash but nitrogen, phosphorus, and organic matter are missing. They are suitable for cotton cultivation, hence named as black cotton soil because of their capacity to retain water.
What is the active zone in black cotton soil explain the properties of black cotton soil?
The zone up to which the soil gets affected for swelling and drying is called active zone. Water table in the areas of black cotton soils is deep hence it is the rain water and storm water which is to be prevented from coming into contact with black cotton soil of the active zone.
What is the texture of a black soil?
Soil Texture: Black cotton soil (regur soil) is highly argillaceous i.e. clayey. It is deep and impermeable and thus has high water retention capacity. Soil Colour: These soils are black in colour due to the presence of iron, aluminium compounds and humus.
How can you tell black cotton soil?
The black cotton soil by observation looks dark in color and by sample test it is characterized by the phenomenon of swelling when wet and shrinks when dry. These changes describe the nature of black cotton soil obtained in Adamawa State.
Why is black soil is also known as black cotton soil?
Answer: Black soil is also known as cotton soil. Black soil is called cotton soil because cotton is a well-grown crop on the black soil which grows very well. These soils are deficient in nitrogen, phosphoric acid and organic matter but rich in calcium, potash and magnesium.
What is the bearing capacity of black cotton soil?
Gopal Mishra
| Types of Soil | Bearing Capacity (Kg/m2) | Bearing Capacity (kN/m2) |
|---|---|---|
| Black cotton soil | 15000 | 150 |
| Moist clay and sand clay Mixture | 15000 | 150 |
| Loose gravel | 25000 | 250 |
| Medium clay | 25000 | 250 |
Is classification of black cotton soil?
The soil is classified as A-7-C as per HRB classification system and A-7-6 AASHTO classification system [48] and highly compressible clay with the group symbol CH as per IS classification system and unified soil classification system [49]. The liquid limit and plasticity index of the soil are 71% and 48% respectively.
Which type of soil is best for growing cotton?
Cotton is best grown in soils with an excellent water holding capacity. Aeration and good drainage are equally important as the crop cannot withstand excessive moisture and water logging. The major soil types suitable for cotton cultivation are alluvial, clayey and red sandy loam.
What is the other name of black cotton soil?
regur soil
Black soil is also known as black cotton soil or the regur soil. Black cotton soil is known as ‘tropical chernozems’ in the other parts of the world. These soils are named as black cotton soil as it is famous for the purpose of cultivation of cotton.
Why is black soil suitable for growing cotton?
Important features of black soil: Regur means cotton – best soil for cotton cultivation. Most of the Deccan is occupied by Black soil. Mature soil. High water retaining capacity. Swells and will become sticky when wet and shrink when dried. Self-ploughing is a characteristic of the black soil as it develops wide cracks when dried. of black.htm
What are the properties of black cotton soil?
Black soil has a texture like clayey and is highly fertile.
Which soil are best for cotton?
The Best Soil for Cotton. The cotton favorite,sandy loam,is silt and clay that contains some sand.
What are the uses of black soil?
In places with consistent rain, black soil is normally used for growing millet, cotton, soybean, sorghum and pigeon pea. When the soil is irrigated, black soil is used to cultivate other crops, for example, sugar cane, wheat, tobacco, and citrus crops. The soil can be used as a building material.