Q. Which one of the following statements is correct regarding the Nitrogen Use Efficiency (NUE)?
Red Book
Red Book

[A] It is the measure of how much nitrogen is absorbed by the soil from fertilizers.

[B] High NUE always results in the highest crop yields.

[C] Leguminous plants have lower NUE compared to non-leguminous plants.

[D] It is the ratio of nitrogen absorbed by the plant to the total nitrogen applied to the soil.

Answer: D
Notes:

Explanation – NUE is a key metric in agriculture that measures how effectively a plant utilizes the nitrogen available to it. This includes nitrogen from both natural sources (like organic matter in the soil) and artificial sources (such as fertilizers). It is calculated by taking the amount of nitrogen that the plant actually absorbs and uses for growth and dividing it by the total amount of nitrogen that was applied to the soil. This gives an indication of how much of the applied nitrogen is being effectively used by the plant.

Source: The Hindu

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