A primitive form of cultivation called Bewar is practised in which state?

Bewar is a traditional form of shifting (slash-and-burn) cultivation practised by tribal communities, particularly the Baiga tribe, in the state of Madhya Pradesh.
Some regional terms for shifting cultivation in India include:

Jhum — North-Eastern states (Mizoram, Assam, etc.)

Podu — Andhra Pradesh and Odisha

Kumari — Western Ghats

Penda / Bewar / Dahiya — Madhya Pradesh