Deposition of lime
Weathering of rocks
Intensive cultivation
Water evaporation in dry conditions
Answer is Right!
Answer is Wrong!
The correct answer is: a) Deposition of lime.
Kankar is a type of calcium carbonate (CaCO3) that forms in soils. It is a hard, white deposit that can be found in the topsoil or subsoil. Kankar can form when lime-rich water evaporates, leaving behind a deposit of calcium carbonate. It can also form when limestone or dolomite rocks weather down.
Kankar can be a problem for farmers because it can make the soil hard and difficult to work. It can also reduce the amount of water that the soil can hold. However, kankar can also be beneficial because it can help to improve the drainage of the soil and reduce the risk of erosion.
The other options are incorrect because:
- Option b) Weathering of rocks is not the main cause of kankar formation. Kankar can form when limestone or dolomite rocks weather down, but this is not the main cause.
- Option c) Intensive cultivation does not cause kankar formation. In fact, intensive cultivation can actually help to reduce the amount of kankar in the soil.
- Option d) Water evaporation in dry conditions does not cause kankar formation. Kankar can form when lime-rich water evaporates, but this is not the only way that kankar can form.