### 2.18.4.3. Outputs of Retranslocation algorithm.[¶](#outputs-of-retranslocation-algorithm "Permalink to this headline")

The final output of the retranslocation calculation are the retranslocated N (\\(N\_{retrans}\\), gN m\-2), C spent on retranslocation (\\(C\_{retrans\_paid}\\), gC m\-2), and C accounted for by retranslocation (\\(C\_{retrans\_accounted}\\), gC m\-2).

For paid-for uptake, we accumulate the total carbon spent on retranslocation (\\(C\_{spent\_retrans}\\)),

> \\\[C\_{retrans,spent} = \\sum{C\_{retrans,i}}\\\]

The total N acquired from retranslocation is

> \\\[N\_{retrans} = N\_{retrans,paid}+N\_{retrans,free}\\\]

where N acquired by paid-for retranslocation is

> \\\[N\_{retrans,paid} = \\sum{N\_{retrans,paid,i}}\\\]

The total carbon accounted for by retranslocation is the sum of the C accounted for by paid-for N uptake (\\(N\_{retrans\_paid}\\)) and by free N uptake (\\(N\_{retrans\_free}\\)).

> \\\[C\_{retrans,accounted} = \\sum{C\_{retrans,accounted,i}}+N\_{retrans,free}.CN\_{plant} . (1.0 + gr\_{frac})\\\]

The total available carbon in FUN to spend on fixation and active uptake (\\(C\_{tospend}\\), gC m\-2) is calculated as the carbon available minus that account for by retranslocation:

> \\\[C\_{tospend} = C\_{avail} - C\_{retrans,accounted}\\\]

