Question

Consider the following statement with regard to Redworms:

1. They are used vermicomposting.

2. Redworms have a structure called a gizzard, which helps them in grinding their food.

3. Redworms can survive in very hot or very cold surroundings.

Which of the following statements given above is/are correct?

1. 1 only 
2. 1 and 2 only
3. 2 and 3 only
4. 1, 2 and 3

Answer 1

Correct Answer - Option 2 : 1 and 2 only

The correct answer is 1 and 2 only.

• A type of earthworm called Redworm is used for composting.
• The method of preparing compost with the help of redworms is called vermicomposting. Hence, statement 1 is correct.
• Redworms do not have teeth. They have a structure called ‘gizzard’, which helps them in grinding their food. Hence, statement 2 is correct.
• Powdered eggshells or seashells could be mixed with the wastes.
• This would help redworms in grinding their food.
• A redworm can eat food equal to its own weight, in a day.
• Redworms do not survive in very hot or very cold surroundings. They also need moisture around them. Hence statements 3 is incorrect.

• Vermicomposting is a process in which earthworms are used to convert organic materials into humus-like material known as vermicompost.
  • Vermicomposting is a quick, efficient way to convert kitchen scraps into a rich soil amendment using earthworms.
• A number of researchers throughout the world have found that the nutrient profile in vermicompost is generally higher than traditional compost.
• In fact, vermicompost can enhance soil fertility physically, chemically and biologically; hence considered one of the effective ways of organic farming.
  • Physically, vermicompost-treated soil has better aeration, porosity, bulk density and water retention. 
• Vermicompost worms break down organic matter, such as kitchen scraps, into waste products called castings.
  • Although castings may be a waste to the worms, they are a rich treasure for gardeners.
• Vermicompost is richer in essential plant nutrients such as nitrogen, phosphorous and potassium than traditional compost.
• It also contains microbes that help plants grow.