What is the origin of black soil ? What are its Physical properties?
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Origin of Black soil
- Black soil is formed the weathering.
- Breaking of Igneous rocks.
- Cooling or solidification of Cretaceous lava from the volcano eruption.
FACT
Black soil is also called as lava soil
Physical properties of Black soil
- Clayey texture and highly fertile.
- Rich in calcium carbonate , magnesium , Potash and lime but poor in nitrogen and phosphorus.
- Highly retentive of moisture , extremely compact and tenacious when wet.
- Contractable and develops deep wide cracks on drying.
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