Ertragsniveau und Standort dargestellt am Beispiel der Kiefer

Summary

The yield level of a stand of a given species expresses quantatively the potentiality of a site to produce wood. The General Yield Level is defined as the relative total production per unit area for a given mean-or top height. The so-called Specific Yield Level specifies the variation in the total volume production of stands of a given age and site quality class. The author’s studies in stands of scots pine reveal that the total volume production in stands of a given height varies as much as 20%. Yield levels above the average are found on dry sites, those below the average on loamy soils with a high soil water level.Assmann’s studies in spruce stands, however, revealed the occurrence of relatively high yield levels on loamy soils with a favourable soil moisture regime. In addition to soil moisture regime, the yield level of a stand is affected by the duration of the growing season and by rooting habits of the species.