Manure prepared with the help of earthworms is called :

Correct option is A

The correct answer is (a) Vermicompost
Explanation:
· Definition: Vermicompost (or worm compost) is the product of the composting process using various species of worms, usually red wigglers, white worms, and other earthworms.
· Process: The earthworms feed on organic waste materials (like kitchen scraps, crop residues) and break them down. Their excreta, known as worm castings, is a nutrient-rich organic fertilizer.
· Benefit: This process is faster than traditional composting because the worms physically break down the material and their gut bacteria aid in chemical decomposition.
Additional Information (Other Options):
· (b) Green manure: This involves growing specific plants (usually leguminous crops like Sunn hemp or Sesbania) and then plowing them directly into the soil while they are still green. This adds nitrogen and organic matter to the soil.
· (c) Compost: A general term for organic matter that has been decomposed by microorganisms (bacteria and fungi) over a period of time. While earthworms may naturally be present, the term doesn't specifically imply their primary use.
· (d) Farm yard manure (FYM): This refers to the decomposed mixture of dung and urine of farm animals along with litter and leftover fodder. It is one of the most common traditional fertilizers.
Information Booster:
· "Farmer's Friend": Earthworms are often called the farmer's friend because they not only create vermicompost but also burrow through the soil, improving its aeration and drainage.
· Key Species: The most common earthworm species used for vermicomposting is Eisenia fetida (Red Wiggler).
· Nutrient Rich: Vermicompost typically contains higher percentages of Nitrogen, Phosphorus, and Potassium (N-P-K) compared to regular garden soil.