Consider the following features of black soil:
- Black soil is very retentive of moisture.
- It is highly argillaceous with a large clay factor and without gravel or coarse sand.
- Black soils of uplands are of low fertility but they are darker, deeper and richer in the valleys.
Which of the above statements are correct?
Correct answer: D
Explanation
Black soil is highly retentive of moisture, swelling when wet and cracking when dry. It's highly argillaceous with a large clay factor and lacks gravel or coarse sand. Black soils on uplands are of low fertility but become darker, deeper and richer in the valleys, so all three statements are correct.