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Environment and Ecology
2022
Ecology & Ecosystems
Agriculture and Environment

Which of the following are nitrogen-fixing plants?

  1. Alfalfa
  2. Amaranth
  3. Chickpea
  4. Clover
  5. Purslane (Kulfa)
  6. Spinach Select the correct answer using the code given below:

B.1, 3, 5 and 6 only
C.2, 4, 5 and 6 only
A.1, 3 and 4 only
D.1, 2, 4, 5 and 6

Correct Answer: Option A

Let's analyze each plant:

  • Alfalfa: A perennial flowering plant in the legume family (Fabaceae). It exhibits symbiotic N2 fixation, providing nitrogen to the soil and subsequent crops.

  • Amaranth: A genus of annual or short-lived perennial plants. It is not a nitrogen-fixing plant.

  • Chickpea: An annual legume of the family Fabaceae. Legumes are known for their nitrogen-fixing capabilities.

  • Clover: Nitrogen fixation occurs in clovers through a symbiotic relationship with Rhizobium bacteria that infect the plant's roots.

  • Purslane (Kulfa): A leafy vegetable that is not a nitrogen-fixing plant.

  • Spinach: A leafy green plant that is not a nitrogen-fixing plant.

Therefore, Alfalfa, Chickpea, and Clover are nitrogen-fixing plants.

Hence, option a is correct.

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