Correct Option
The correct option is Acidic nature with low humus content.
Explanation
Forest soils are formed in regions with sufficient rainfall and forest cover. Their characteristics vary significantly depending on the mountain environment and altitude at which they are found.
Detailed Analysis
- Snow-Covered Areas (High Altitude): In the snow-bound areas of the Himalayas, soils are subjected to severe denudation and extreme cold. Low temperatures inhibit bacterial activity, slowing down the decomposition of organic matter. As a result, these soils are acidic in nature and have low humus content.
- Valley Sides and Lower Slopes: In contrast, soils found in the lower parts of the valleys are typically loamy and silty. These areas tend to be fertile compared to the upper slopes.
- Upper Slopes: The soils here are generally coarse-grained and lack the fertility found in the valley bottoms.
Key Takeaway: Forest soils in snow-bound Himalayan regions are distinctively acidic with low humus content due to denudation and the inhibition of decomposition by cold temperatures.