Table 1B.
Notation
| Symbol | Definition | Unit |
| Main symbols | ||
| a | Light extinction coefficient | m2 (ground) mol–1 (C) |
| bg | Growth limitation border | – |
| bp | Photosynthesis limitation border | – |
| CJj | Concentration of substance J in compartment j | mol (J) m–3 |
| CJ | Content of substance J | mol (J) kg–1 (DM) |
| C | Exponent in respiration equation | K–1 |
| E{Tj} | Maintenance respiration rate of a closed‐canopy crop | mol (C) m–2 (ground) s–1 |
| FCg | Growth respiration rate | mol (C) m–2 (ground) s–1 |
| FCm | Maintenance respiration rate | mol (C) m–2 (ground) s–1 |
| F Cp | Gross photosynthesis rate | mol (C) m–2 (ground) s–1 |
| F Jij | Flux of substance J from compartment i to compartment j | mol (J) m–2 (ground) s–1 |
| f{MCs} | Fraction of light intercepted by canopy | – |
| g | A collection of parameters | m3 (H2O) Pa mol–1 (C) |
| G{Tj} | Unattenuated growth rate of a closed canopy | mol (C) m–2 (ground) s–1 |
| hg{ΓCv} | Growth limitation function (hg = 1 when no limitation) | – |
| hp{ΓCv} | Photosynthesis limitation function (hp = 1 when no limitation) | – |
| I | Light intensity | mol (PAP) m–2 (ground) s–1 |
| K | Maintenance respiration rate at T = T* | mol (C) m–2 (ground) s–1 |
| K | Michaelis–Menten coefficient for N uptake | mol (N) m–3 (H2O) |
| M Jj | Molar mass of substance J in compartment j | mol (J) m–2 (ground) |
| p | Plants per unit ground area | plant m–2 |
| P{I,CCa} | Unattenuated gross photosynthesis of a closed canopy | mol (C) m–2 (ground) s–1 |
| r | N : C ratio in structure | mol (N) mol–1 (C) |
| s g | Growth limitation slope | – |
| s p | Photosynthesis limitation slope | – |
| T j | Temperature of compartment j | K |
| T * | Reference temperature | K |
| t | Time | s |
| U{CNn,Tn} | Uptake rate of nitrogen by a closed canopy | mol (N) m–2 (ground) s–1 |
| V | Volume of water | m3 (H2O) m–2 (ground) |
| W | Weight of plant | kg per plant |
| θ | Osmotic potential associated with one unit of vacuolar J | m3 (H2O) Pa mol–1 (J) |
| ΓJv | Normalised J‐concentration in vacuole | – |
| ϵ | Photosynthetic efficiency | mol (C) mol–1 (PAP) |
| ζ | An alternative to ξ | – |
| ηJ | Conversion factor; dry matter to substance J | kg (DM) mol–1 (J) |
| θ | Growth respiration as fraction of growth | – |
| λ | Volume of water associated with one unit of structural C | m3 (H2O) mol–1 (C) |
| ν | Ratio g{t}/e{t} | – |
| ξ | Partitioning parameter | – |
| Π | Osmotic potential in vacuole | Pa |
| ρ | Density of water | kg (H2O) m–3 (H2O) |
| σ | Leaf conductance to CO2 | m s–1 |
| ϕ | Nitrogen uptake efficiency | mol (N) mol–1 (C) |
| Subscripts | ||
| Compartments | ||
| a | Ambient air | |
| e | Excess carbon | |
| i,j | General compartment indices | |
| n | Nutrient solution | |
| s | Structure | |
| v | Vacuole | |
| Substances | ||
| C | Carbon | |
| D | Dry matter | |
| F | Fresh matter | |
| I,J | General substance indices | |
| N | Nitrogen | |
| nit‐N | nitrate N | |
| red‐N | reduced N | |
| tot‐N | total N | |
| Nutritional situations | ||
| A | Abundant N | |
| L | Limiting N | |
| Acronyms | ||
| DMC | Dry matter content | |
| FM | Fresh matter | |
| PAP | Photosynthetically active photons | |
| RGR | Relative growth rate | |
| RNR | Relative nutrient addition rate |
–, Indicates dimensionless quantities.
{}, Used exclusively to contain the arguments of functions.