Use Leaf Phosphorus Content when you need to compute leaf phosphorus content in milligrams per gram of leaf dry mass as the phosphorus mass divided by the leaf dry mass. Enter Phosphorus mass and Leaf dry mass using the definitions and units below so the result can be reproduced.

Phosphorus mass

A finite measured or assumed value, expressed in mg.

Leaf dry mass

A finite measured or assumed value, expressed in g.

The published tool contract uses this rule: Compute leaf phosphorus content in milligrams per gram of leaf dry mass as the phosphorus mass divided by the leaf dry mass.^[1]

Leaf phosphorus content

The calculated leaf phosphorus content in mg/g.

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 Phosphorus mass and Leaf dry mass values and their units alongside the result. Leaf Nitrogen Content is useful when you instead need to compute leaf nitrogen content in milligrams per gram of leaf dry mass as the nitrogen mass divided by the leaf dry mass. Leaf Potassium Content provides another view by helping you compute leaf potassium content in milligrams per gram of leaf dry mass as the potassium mass divided by the leaf dry mass.

• Leaf Nitrogen Content

  Compute leaf nitrogen content in milligrams per gram of leaf dry mass as the nitrogen mass divided by the leaf dry mass.

• Leaf Potassium Content

  Compute leaf potassium content in milligrams per gram of leaf dry mass as the potassium mass divided by the leaf dry mass.

• LDMC Percent

  Compute leaf dry matter content as a percentage from oven dry leaf mass over turgid fresh leaf mass.