Consider the following statements regarding black soils. |
1. These are poor in nitrogen, phosphorus, potassium and organic matter and rich in potash and lime. |
2. These are porous, friable in nature. |
3. These suited for dry farming as it does not require much moisture. |
4. These soils expand when wet and become difficult to plough. |
Which of the statements given above are correct? |
A) 1, 2 and 3
B) 2, 3 and 4.
C) 1, 3 and 4
D) All of these
Correct Answer: C
Solution :
[c]Characteristics of black soils are as follow |
? Fine textured and clayey in nature. |
? Has high qualities of lime, iron, magnesium and generally poor percentage of phosphorus, nitrogen and organic matter. |
? Black in colour as it is formed from weathered lava rocks, |
? Soil's colour also varies from black to chestnut brown. |
? Very clayey and therefore highly retentive of water. Because of high clay content, these soils expand when wet and become difficult to plough. |
? During dry season, black soils shrink and develop big, cracks which help in air circulation. |
? Soil is very fertile in most of places. |
? Poor in nitrogen, phosphorus, potassium and organic matter and rich in potash and lime. |
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