A municipal corporation plans to set up a vermicomposting facility for biodegradable waste. The recommended depth of the vermicomposting pit for optimal earthworm activity is:
- A 15 to 20 cm
- B 30 to 45 cm ✓
- C 75 to 90 cm
- D 120 to 150 cm
Correct answer: B. 30 to 45 cm
Explanation
Vermicomposting pits are typically maintained at a depth of 30 to 45 cm to ensure adequate aeration, moisture retention, and earthworm mobility. Deeper pits create anaerobic conditions harmful to Eisenia fetida, the species commonly used. Shallow beds below 30 cm dry out too quickly. This specification is recommended in CPHEEO manual and urban local body guidelines for decentralized waste processing.
Reference: CPHEEO Manual on Sewerage and Sanitation
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.