Stem boron content per stem dry mass

Formal name:  stem boron content per stem dry mass
Local identifier:  TOP489
Synonym Term:  stem B content per dry mass
Related Term:  stem B concentration
Related Term:  stem B content
Definition:  The ratio of the quantity (SEP:quantity) of boron (CHEBI:boron atom) in the stem (PO:stem) to the corresponding stem (PO:stem) mass (PATO:mass) assessed after drying
Formal Unit:  mass unit / mass unit or amount unit / mass unit

Comment:  The quantity of boron 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.
Reference:  Eric Garnier, Jens Kattge, Stefan Klotz, Ingolf Kühn, Ulrike Stahl