Q48. Which of the following are nitrogen-fixing plants?
Alfalfa
Amaranth
Chickpea
Clover
Purslane (Kulfa)
Spinach
Select the correct answer using the code given below: a) 1, 3 and 4 only b) 1, 3, 5 and 6 only c) 2, 4, 5 and 6 only d) 1, 2, 4, 5 and 6
Answer – A
Nitrogen fixation is a chemical process by which molecular nitrogen (N2), with a strong triple covalent bond, in the air is converted into ammonia (NH3) or related nitrogenous compounds, typically in soil or aquatic systems but also in industry. Rhizobium is a rod-shaped nitrogen-fixing bacteria live symbiotically within the roots of several leguminous plants such as alfalfa, sweet clover, sweet pea, lentils etc.
The amaranth plant is a grain and green crop plant, because it is not a pulse crop and do not nitrogen-fixing mechanism. The purslane plant is one of the few vegetables that are rich in omega-3 fatty acids, which are important to support healthy arteries and can help prevent strokes, heart attacks, and other forms of heart disease. It also does not have a nitrogen-fixing mechanism at the root zone.
