Black soils are known for its fertility with little or no evidence of exhaustion. This is because1. Black soils with equal proportion of clay, gravel and coarse sand has high moisture retention capacity.2. Cracks developed during dry season allow oxygenation of the soils.3. Black soil has low level of kankar thus supports wide variety of crops.Choose the incorrect reason from the codes below

Black soils are known for its fertility with little or no evidence of exhaustion. This is because
1. Black soils with equal proportion of clay, gravel and coarse sand has high moisture retention capacity.
2. Cracks developed during dry season allow oxygenation of the soils.
3. Black soil has low level of kankar thus supports wide variety of crops.
Choose the incorrect reason from the codes below

2 Only.

2, 3 only.

1, 3 only.

All the above.

Explanation:
Black soil is mainly composed of clay, thus it has high moisture retention capacity. Black soilsare in fact rich in kankar nodules which add to the fertility of the soil.