Summary of "Carbon Allocation for Maintenance Respiration Costs":

## Carbon Allocation Priorities

1. Maintenance Respiration Demand
   - The total maintenance respiration demand (CFmr) is calculated based on tissue mass, nitrogen concentration, and temperature.
   - The carbon supply to meet this demand comes from:
     - Current photosynthesis (CFGPPmr)
     - A storage pool that is drawn down when demand exceeds photosynthesis (CFxsmr)

2. Replenishing the Internal Carbon Storage Pool
   - The storage pool (CSxs) is permitted to run a deficit, and the allocation to replenish this deficit (CFGPPxs) increases as the deficit grows.
   - This allows the model to adapt to different climate and plant type combinations without needing to know the total maintenance respiration demand in advance.

3. Supporting Growth of New Tissues
   - After meeting the maintenance respiration demand and replenishing the storage pool, any remaining carbon is allocated to the growth of new tissues.

## Key Equations
1. CFmr = CFGPPmr + CFxsmr
2. CFGPPmr is the minimum of CFmr and CFGPP
3. CFxsmr is the difference between CFmr and CFGPP, if CFmr exceeds CFGPP
4. CFGPPxs is set to 0 if CSxs is non-negative, and is proportional to the negative value of CSxs if it is negative.
5. CFGPPxs is limited to the maximum value of CFGPP - CFGPPmr.