Correct option is B
The correct answer is (B) Shifting agriculture
Shifting agriculture, also known as slash-and-burn agriculture, is widely practiced in Northeast India. It involves clearing forests by burning and cultivating the land for a few years before moving on to a new plot. This practice leads to soil degradation and erosion because the soil loses its fertility over time and is left exposed after the forest cover is removed.
Soil erosion occurs because the land is not permanently cultivated and the topsoil is not protected from the rain and wind.
Shifting Agriculture:
Commonly known as Jhum cultivation, it involves rotating cultivation areas. After a few years of cultivation, the land is left fallow to regenerate.
This practice is environmentally unsustainable in the long term, as it causes deforestation and loss of soil nutrients, leading to erosion.
Other Farming Practices:
Mixed farming involves both crop cultivation and livestock rearing, and is generally sustainable with proper management.
Terrace farming is common in hilly regions and helps reduce soil erosion by creating steps on the hillside to hold water and soil.
Dairy farming does not inherently cause soil erosion but may contribute to land degradation if not managed properly.
Option A (Mixed farming): Incorrect. Mixed farming does not lead to soil erosion when practiced properly.
Option C (Terrace farming): Incorrect. Terrace farming helps prevent soil erosion, especially on hilly terrain.
Option D (Dairy farming): Incorrect. Dairy farming does not directly contribute to soil erosion.