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Grow rates - Coggle Diagram

- - - - E. grandis has the fastest growth, with an MAI of 25-30 m3/ha at 10 years on intermediate sites.
      - In most cases, the age at which the MAI reaches its maximum is between 8 and 20 years.
      - There is no logical relationship between the effect of site quality and the age at which the MAI peaks.
- - - - Actual volume or stacked volume
        
        In cases where the product is sold for firewood, stacked volume is used.
        
        The volume of the stem is measured from ground level. With this measurement, the volume of the stump is included. In other cases, stem volume is assumed to exclude stump volume.
      - Apical diameter
        
        Volumes with and without bark.
      - Shape coefficients
      - Measurement of site quality by height growth
        
        There is a difference in yield for the same species. Even when identical seed supply and management practices have been used, yields vary according to the relative site quality or productivity for that species. For this, there are detailed measurements in test plots, to indicate the yields that can be expected at different ages on different sites.
        
        For the use of production tables, there has to be an estimate of season quality.
        
        The ratio of height to age is commonly used as a measure of site quality because measuring height is much easier than measuring volume, which is more accurate.
        
        This reflects site productivity. Height is less influenced by management practices.
        
        Site class or quality class: a measure of the relative productivity capacity of a site for the crop or stand under observation.
        
        Site index: a particular measure of site class based on the height of dominant trees in a stand at an arbitrarily chosen age.