Geologic division of alluvial soil
Geologically, alluvial plains of India's great plains are divided into new or small khands and old scraps of soil.
Bhabar
The Bihar belt is running approximately 8-16 km wide with the Shivalik foothills. This is a punctual, northern biggest stretch of Indo-Gangetic plains.
Rivers descending from the Himalayas collect their load with the foothills as aquatic fans. These alluvial fans (often pebbled clay) have merged together to form a tomb belt.
The hawk's hole is the most unique feature. Porosity is due to the large number of alluvial fans in the statement of pebble and rock debris.
Due to this porosity, the stream disappears after reaching the bhabar area. Therefore, the area is marked by dry river courses except rainy season.
This area is not suitable for agriculture and in this belt only big trees grow with big roots.
Lowland
Thirai is running a parallel parallel to the south of Bhabra, a sick dry, salt (marshi) and broadly narrow narrow path (15-30 km wide).
The underground streams of the Bhabar belt emerge in this belt. It is a boggy lower land with silky soil.
Lowland soils are rich in nitrogen and organic matter but there is a decrease in phosphate.
These muds are usually covered with long grasses and forests but suitable for many crops like wheat, rice, sugarcane, jute etc.
This thick forest area provides shelter for various wildlife.
Bhangar
The old aluminum with the beds of the scratched river, which produces more than 30 meters above the floodplain (about 30 meters above the flood level).
It is of another soil structure and is usually black colored.
Under the scrap roof, there are some meters of lemon node bed called "pebbles".
Khadar
The cavity is made of new aluminum and forms the floodplains along the banks of the river.
The banks flood every year, and each new layer of aluminum is deposited with each flood. This gives them the most fertile soil of the Ganges.
They are sandy soil and foams, more dry and leech, less calciusius and carbonate (less cumulus). Almost every year a new layer of aluminum is deposited with the river flood.
Black soil
The original material for most black soils is volcanic rocks which were made in the Deccan Plateau (Deccan and Rajmahal Traps).
In Tamil Nadu, gneisses and schists make the original material. The pre-adequate depths are generally deep, while later they are usually shallow.
These are areas of high temperatures and low rainfall. Therefore, it is typical for dry and hot areas of a clay group peninsula.
Black soil signs
A typical black soil is highly irrational [geography (rocks or sediment) which includes soil or soil) with a large soil factor, 62 percent or more.
Generally, the black soil of the suburbs is less reproducible, whereas in the valleys it is very fertile.
Black soil is highly retention of moisture. It swells quite a lot on depositing moisture. In rainy season, hard work is required to work on such mud because it becomes very sticky.
In the summer, moisture evaporates, soil is reduced and surrounded with broad and deep cracks. The lower layers can still maintain moisture. Cracks allow the soil's oxygen to sufficient depth and there is extraordinary fertility in the soil.
Black clay color
The black color titanifers is caused by the presence of a small proportion of iron and black components of magnetite or parent rock.
In Tamilnadu and parts of Andhra Pradesh, black color is taken from crystalline skist and original ganis.
The dark black, medium black, shallow black colored black tin, red and black mixture can be found in this group of soil.
Chemical composition of black soil
10 percent alumina,
9-10 percent of iron oxide,
6-8 percent of lemon and magnesium carbonate,
Potash is convertible (less than 0.5 percent) and
Phosphate, nitrogen and humid are low.
Black soil distribution
In Maharashtra, Madhya Pradesh, parts of Karnataka, Telangana, Andhra Pradesh, Gujarat and Tamil Nadu spread over 46 lakh square kilometers (16.6 percent of the total area).
Black soil crop
These muds are most suitable for cotton crop. Therefore these soils are called regur and black cotton form of soil.
Other major crops grown on black soil include wheat, jowar, linseed, virgin tobacco, cast, sunflower and millet.
Rice and sugarcane are equally important where irrigation facilities are available.
Large varieties of vegetables and fruits are also grown successfully on black soil.
This soil has been used to increase various crops for centuries without adding fertilizers and manure, which has little or no evidence of exhaustion.
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