Concept:Bush fallowing means leaving farmland uncultivated for a few years so natural bushes regrow and restore soil fertility.
Explanation:In shifting cultivation, farmers clear a new plot and abandon the old one for natural regrowth.
This abandoned plot undergoes bush fallowing while the farmer moves elsewhere.
Land rotation also depends on bush fallowing because different fields are used in turns.
While one field is in use, the other field is left to grow bush and regain nutrients.
Mixed farming, crop rotation, and monoculture do not generally allow land to rest under bush.
Therefore, both shifting cultivation and land rotation are the systems that practise bush fallowing.
Answer:B. shifting cultivation and land rotation