Answer:
We can differentiate them on the basis of age. Khadar is new whereas Bhangar is old.
Step-by-step explanation:
Bangar is an old alluvial soil whereas, Khadar is new alluvial soil. Bangar contains big nodules called 'kankar' whereas khadar does not have that. This is an old soil which is alluvial in nature and is above the flood levels of the rivers in the region.