Nutrient Use Efficiency (NUE) is defined as what?

Nutrient Use Efficiency (NUE) is defined as what?

• A. NUE is the crop yield per unit of nutrient applied.
• B. NUE is the crop yield per unit of nutrient applied under drought conditions.
• C. NUE is the total nutrient input per hectare.
• D. NUE is the percentage of nutrients absorbed by the roots.

Answer: (B)

NUE measures how effectively a crop converts available nutrients into yield. When we look at Nutrient Use Efficiency, the key idea is yield produced per unit of nutrient that is applied (or taken up) by the plant. Evaluating this under drought conditions is especially informative because water stress alters nutrient availability and uptake. Seeing yield per unit nutrient under drought tells us how well the plant uses limited water and nutrients together, highlighting efficiency when resources are scarce. The other descriptions don't fit as well in this context: a general yield per unit of nutrient applied ignores how drought changes uptake and use; total nutrient input per hectare isn’t a measure of efficiency; and the percentage of nutrients absorbed by the roots describes uptake fraction, not how much yield is obtained per unit of nutrient used.

NUE measures how effectively a crop converts available nutrients into yield. When we look at Nutrient Use Efficiency, the key idea is yield produced per unit of nutrient that is applied (or taken up) by the plant. Evaluating this under drought conditions is especially informative because water stress alters nutrient availability and uptake. Seeing yield per unit nutrient under drought tells us how well the plant uses limited water and nutrients together, highlighting efficiency when resources are scarce.

The other descriptions don't fit as well in this context: a general yield per unit of nutrient applied ignores how drought changes uptake and use; total nutrient input per hectare isn’t a measure of efficiency; and the percentage of nutrients absorbed by the roots describes uptake fraction, not how much yield is obtained per unit of nutrient used.