# Returns the biomass of a maritime pine branch

### Description

Returns the woody biomass of a maritime pine branch (dry state, no leaves!) in kg given the diameter, using an allometric equation

### Usage

1 | ```
allometryPorte2002(x, diameter)
``` |

### Arguments

`x` |
a data frame holding diameters of branches |

`diameter` |
the name of the column holding diameter of the x data frame, diameters should be in cm |

### Value

the woody biomass (dry state, no leaves!) of the branch of a maritime pine (in kg)

### Note

The allometric equation has been validated for <10 cm diameter branches, extrapolation on larger branches my yield unreasonable results.

The allometric equation takes the form of a power equation

### References

Port\'e, A. and Trichet, P. and Bert, D. and Loustau, D. 2002, Allometric relationships for branch and tree woody biomass of Maritime pine (*Pinus pinaster* Ait.) *Forest Ecology and Management*, **158**, 71–83

### See Also

`powerEquation`

Other Biomass: `allometryABDC`

,
`allometryAsca2011`

,
`allometryCutini2009`

,
`logBiomass`

, `powerEquation`

,
`pureQuadraticEquation`

,
`treeBiomass`

, `treeTotalBiomass`