production class, yield level, carrying capacity

In addition to site quality, the yield level indicates the productivity of a stand at a given site. It is influenced by local growth conditions and determined by the total growth performance (GWL) that the stand achieves at a specific mean or dominant height. The general yield level is the average value, while the current yield level refers to a specific height class. It defines the total growth performance at a given dominant height that a stand reaches at a certain age, often using a reference age of 100 years.