Root calcium content per root dry mass trait

Formal name:  root calcium content per root dry mass
Local identifier:  TOP712
Synonym Term:  root Ca content per dry mass
Related Term:  root Ca content
Related Term:  root Ca concentration
Definition:  The ratio of the quantity (SEP:quantity) of calcium (CHEBI:calcium atom) in the root (PO:root) to the corresponding root mass (PATO:mass) assessed after drying
Formal Unit:  mass unit / mass unit or amount unit / mass unit

Comment:  The quantity of calcium can be expressed either as a mass (with mass unit, e.g. gram) or as an amount (with amount unit, e.g. mol). The term concentration is polysemic and we suggest to not use it in this context. When known, the component of the root on which the measurements have been taken should be specified: coarse root, fine root.
Reference:  Eric Garnier, Jens Kattge, Stefan Klotz, Ingolf Kühn, Ulrike Stahl