Extending along the southern and eastern faces of the Satpura range lies the fourth geographical division, to the west the plain of Berar and Nagpur, watered by the Purna, Wardha and Wainganga rivers, and further east the Chhattisgarh plain, which forms the upper basin of the Mahanadi.

The Berar and Nagpur plain contains towards the west the shallow black soil in which autumn crops, like cotton and the large millet juari, which do not require excessive moisture, can be successfully cultivated.

This area is the great cotton-growing tract of the Province, and at present the most wealthy.

The valleys of the Wainganga and Mahanadi further east receive a heavier rainfall and are mainly cropped with rice.

Many small irrigation tanks for rice have been built by the people themselves, and large tank and canal works are now being undertaken by Government to protect the tract from the uncertainty of the rainfall.