Which of the following soil tpye supports earth worm activity?

(A) Loam soil

(B) Gleyed soil

(C) Rendzina

(D) Podzol

Choose the correct answer from the options given below:

The correct answer is A, B and C Only.

Let us understand why loam soil, gleyed soil, and rendzina support earthworm activity, while podzol does not:
1. Loam Soil (A): Loam is a rich, well-aerated soil consisting of a balanced mixture of sand, silt, and clay, along with high organic matter. It retains moisture well while allowing good drainage and aeration, creating the ideal environment for earthworms to borrow, feed, and thrive.
2. Gleyed Soil (B): Gleyed soils are typically waterlogged, anaerobic soils characterized by greyish or blue-grey colors. Although oxygen levels are low, certain earthworm species (especially semi-aquatic or endogeic species) are highly tolerant of wet conditions and remain active in these soils, feeding on organic matter near the surface.
3. Rendzina (C): Rendzina is a shallow, humus-rich soil that develops over limestone or chalky bedrock. It has a high calcium content and is typically alkaline or neutral in pH. Earthworms thrive in calcium-rich environments as calcium is crucial for their calciferous glands, which help regulate blood pH, making rendzina highly supportive of earthworm populations.
4. Podzol (D): Podzols are highly acidic, leached, nutrient-poor forest soils. The high acidity (low pH) and lack of easily digestible nutrients make the environment toxic and unfavorable for earthworms, severely limiting or entirely preventing their activity.

Therefore, earthworm activity is supported by loam soil (A), gleyed soil (B), and rendzina (C).