If my guess is correct it is not bangar and kagar instead it is BANGAR & KHADAR. IF SO TAKE THE BELOW ANSWER
KHADAR: * these r new alluvium deposited soil.
* these r fine & fertile.
* these r found near the river in the flood plain & deltas.
* they r sandy in color.
BANGAR: *these r old alluvium deposited soil in the recent past.
*these r coarse and less fertile whichcontain kankar nodules.
*these r found away from the river specially along the foothills.
*they r clayey and dark in soil.