- `AgeGV` Age of green vegetative matter in degree Celsius days.

- `AgeGR` Age of green reproductive matter in degree Celsius days.

- `AgeDV` Age of dead vegetative matter in degree Celsius days.

- `AgeDR` Age of dead reproductive matter in degree Celsius days.

- `BMGV` biomass of GV (kg DM per ha).

- `BMGR` biomass of GR (kg DM per ha).

- `BMDV` biomass of DV (kg DM per ha).

- `BMDR` biomass of DR (kg DM per ha).

- `BMDR` biomass of DR (kg DM per ha).

- `SENG` senescence of GV (kg DM per ha).

- `SENG` senescence of GR (kg DM per ha).

- `ABSG` abscission of DV (kg DM per ha).

- `ABSG` abscission of DR (kg DM per ha).

- `ST` thermal time (degree days).

- `cBM` cumulative total biomass (kg per ha).

