Use NUE Calculator when you need to compute nitrogen use efficiency as grain yield in kilograms divided by nitrogen applied in kilograms. Enter Grain yield and Nitrogen applied using the definitions and units below so the result can be reproduced.

Grain yield

Grain yield in kilograms; must be greater than zero.

Nitrogen applied

Nitrogen applied in kilograms; must be greater than zero.

The published tool contract uses this rule: Compute nitrogen use efficiency as grain yield in kilograms divided by nitrogen applied in kilograms.^[1]

Nitrogen use efficiency

Kilograms of grain produced per kilogram of nitrogen applied.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Grain yield and Nitrogen applied values and their units alongside the result. PNUE is useful when you instead need to compute photosynthetic nitrogen use efficiency PNUE in micromoles per mole as the net photosynthesis rate divided by the leaf nitrogen per unit area. PUE Calculator provides another view by helping you compute phosphorus use efficiency as yield in kilograms divided by phosphorus applied in kilograms.

• PNUE

  Compute photosynthetic nitrogen use efficiency PNUE in micromoles per mole as the net photosynthesis rate divided by the leaf nitrogen per unit area.

• PUE Calculator

  Compute phosphorus use efficiency as yield in kilograms divided by phosphorus applied in kilograms.

• WUE Calculator

  Compute intrinsic water use efficiency as net photosynthesis in micromoles per square metre per second divided by transpiration in millimoles per square metre per second.