Leaf boron content per leaf area

Formal name:  leaf boron content per leaf area
Local identifier:  TOP469
Synonym Term:  leaf B content per area
Related Term:  leaf B concentration
Related Term:  leaf B content
Definition:  The ratio of the quantity (SEP:quantity) of boron (CHEBI:boron atom) in the leaf (PO:leaf) or component thereof, i.e. leaf lamina or leaflet (PO:leaf lamina, PO:leaflet) per respective area (TOP:leaf area, TOP:leaf lamina area, TOP:leaflet area)
Formal Unit:  mass unit / area unit or amount unit / area 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