$$ extbf{Explanation:}$$ $$ullet$$ In Jhum cultivation or slash and burn method, the forest area or the agricultural field after harvesting or cutting is burnt with the remnants of the crops or the forest plants. $$ullet$$ After burning, the areas are left to recover for atleast a year for regrowth.  $$ullet$$ The ash provides some fertilization that increases the potash content of the soil and supports better growth of crops or regrowth of the forest area.  $$ullet$$ In ecological terms this is referred to as secondary succession.