1. Very simplistic approach, in which we impose retranslocation factor for all elements
   to be 1. This ensures carbon is available for regrowth and the carbon budget is
   closed.
2. This is not an ideal solution because leaf abscission would increase litter stocks
   and consequently modulate the seasonal cycle of heterotrophic respiration. That said,
   this is not necessarily worse than assuming leaf biomass is aseasonal in deciduous-
   dominated ecosystems, and that litter stocks would need to change based on
   environmentally driven seasonality of heterotrophic respiration.

…hen using ST3 mode.