Use Specific Root Length when you need to compute specific root length SRL in metres per gram as root length divided by root dry mass. Enter Root length and Root dry mass using the definitions and units below so the result can be reproduced.

Root length

A finite measured or assumed value, expressed in m.

Root dry mass

A finite measured or assumed value, expressed in g.

The published tool contract uses this rule: Compute specific root length SRL in metres per gram as root length divided by root dry mass.

Specific root length

The calculated specific root length in m/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 Root length and Root dry mass values and their units alongside the result. Specific Root Area is useful when you instead need to compute specific root area SRA in square centimetres per gram as root surface area divided by root dry mass. Root Length Density provides another view by helping you compute root length density RLD in centimetres per cubic centimetre of soil as root length divided by soil core volume.

• Specific Root Area

  Compute specific root area SRA in square centimetres per gram as root surface area divided by root dry mass.

• Root Length Density

  Compute root length density RLD in centimetres per cubic centimetre of soil as root length divided by soil core volume.

• Specific Leaf Area

  Compute specific leaf area SLA in square centimetres per gram as one-sided leaf area divided by leaf dry mass.