Question

According to Darwin, one acre of land may contain

• A. About 100,000 earthworms
• B. About 50,000 earthworms
• C. About 20,000 earthworms
• D. None of the above

Answer 1

The correct option is B About 50,000 earthworms

Darwin in his old ages returned to earthworms and wrote a book which described the volume of soil that earthworms swallow and eject as castings. He reported that an acre of land may contain about 50,000 earthworms and yield 18 tons of castings per year. So, the correct answer is 'About 50,000 earthworms'.