Question:
Agronomic nutrient use efficiency is calculated as: 
Agronomic nutrient use efficiency is calculated as:
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Nutrient use efficiency:
- Agronomic efficiency: (Yield treated - Yield control) Nutrient applied.
- Recovery efficiency: (Nutrient uptake treated - Nutrient uptake control) Nutrient applied.
- Agronomic efficiency: (Yield treated - Yield control) Nutrient applied.
- Recovery efficiency: (Nutrient uptake treated - Nutrient uptake control) Nutrient applied.
Updated On: Aug 27, 2026
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of nutrient use efficiency calculations.
Step 2: Detailed Explanation:
Agronomic efficiency (AE) is the increase in grain yield per unit of nutrient applied.
Formula: AE = (Yield treated - Yield control) Amount of nutrient applied.
Option (A): Grain yield nutrient applied (not the correct definition).
Option (C): Nutrient uptake difference nutrient applied (recovery efficiency).
Option (D): Yield difference uptake difference (not a standard term).
Thus, option (B) is the correct formula.
Step 3: Final Answer:
Thus, agronomic nutrient use efficiency is (Grain yield in treated plot - Grain yield in control) Amount of nutrient applied, which corresponds to option (B).
[0.5cm]
This question tests knowledge of nutrient use efficiency calculations.
Step 2: Detailed Explanation:
Agronomic efficiency (AE) is the increase in grain yield per unit of nutrient applied.
Formula: AE = (Yield treated - Yield control) Amount of nutrient applied.
Option (A): Grain yield nutrient applied (not the correct definition).
Option (C): Nutrient uptake difference nutrient applied (recovery efficiency).
Option (D): Yield difference uptake difference (not a standard term).
Thus, option (B) is the correct formula.
Step 3: Final Answer:
Thus, agronomic nutrient use efficiency is (Grain yield in treated plot - Grain yield in control) Amount of nutrient applied, which corresponds to option (B).
[0.5cm]
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