National exotic forest description yield tables

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.

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.