The correct answer is: D. They have less water absorption capacity.
Karail-Kewal soils are heavy clay soils that are found in the South Bihar plain. They are acidic to alkaline in nature. These soils have a high water retention capacity and are good for growing rice and other crops.
Option A is correct because Karail-Kewal soils are heavy clay soils.
Option B is correct because Karail-Kewal soils are found in the South Bihar plain.
Option C is correct because Karail-Kewal soils are acidic to alkaline in nature.
Option D is incorrect because Karail-Kewal soils have a high water retention capacity.