National exotic forest description yield tables

The National Exotic Forest Description (NEFD) regional yield tables give the forest industry and MPI data used to produce wood availability forecasts.

Exotic forest Table
Last updated: 10 September 2026

Who provides information?

New Zealand's major forest owners and managers provided information for the yield tables which are part of the National Exotic Forest Description (NEFD) database.

What are yield tables?

The yield tables are a representation of forest yield in cubic metres per hectare (m3/ha). The yield table is expressed in total recoverable volume (TRV), and volumes of 3 generic log types, together with any production thinning volumes by age (11 to 40 years for Radiata pine, and 11 to 60 years for Douglas fir).

Yields are for all forest sizes, except for Canterbury where they are split into large scale (1,000 hectares and above) and small scale (under 1,000 hectares) forest. There is a separate yield table for each tending regime.

Radiata pine

Radiata pine tending regime R
Pruned without production thinning I
Unpruned without production thinning M
Pruned with production thinning T
Unpruned with production thinning Z
Radiata pine tending regime
Pruned without production thinning
R
I
Radiata pine tending regime
Unpruned without production thinning
R
M
Radiata pine tending regime
Pruned with production thinning
R
T
Radiata pine tending regime
Unpruned with production thinning
R
Z

Douglas fir

Douglas fir tending regime D
Without production thinning M
With production thinning Z
Douglas fir tending regime
Without production thinning
D
M
Douglas fir tending regime
With production thinning
D
Z

Age of stands

For each crop type and regime, contributors were asked to provide separate yield tables based on when the stand was planted:

  • stands planted pre-1990
  • stands planted post-1989
  • stands of all ages.

For some regions there are additional year of planting splits:

  • stands planted pre-1979
  • stands planted post-1978
  • stands planted between 1979 and 1989
  • stands planted pre-1982
  • stands planted pre-1982
  • stands planted between 1982 and 1989
  • stands planted post-1989
  • stands of all ages.

Log type specifications

 Small end diameter (cm) Maximum branch size (cm) Sweep class
Pruned 35 0 1
Unpruned 20 14 1
Pulp 10 n/a 2

Pruned
Small end diameter (cm)
35
Maximum branch size (cm)
0
Sweep class
1

Unpruned
Small end diameter (cm)
20
Maximum branch size (cm)
14
Sweep class
1

Pulp
Small end diameter (cm)
10
Maximum branch size (cm)
n/a
Sweep class
2

Sweep class

 Log length (mm)
Sweep class <3.7 3.7 to 4.8 4.9 to 7.6 7.6 +
1 d/8 d/4 d/3 d/2
2 d 2d 3d 4d

Sweep class
Log length (mm)
<3.7
3.7 to 4.8
4.9 to 7.6
7.6 +

1
Log length (mm)
d/8
d/4
d/3
d/2

2
Log length (mm)
d
2d
3d
4d
Top