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The mean annual increment (MAI) or mean annual growth refers to the average growth per year a tree or stand of trees has exhibited/experienced up to a specified age. For example, a 20-year-old tree that has a stem volume of 0.2 m 3 has an MAI of 0.01 m 3 /year.
Graph of mean annual increment. Biologists use the concept of maximum sustainable yield (MSY) or mean annual increment (MAI), to determine the optimal harvest age of timber. MSY can be defined as “the largest yield that can be harvested which does not deplete the resource (timber) irreparably and which leaves the resource in good shape for ...
When mean annual increment (MAI) and periodic annual increment (PAI) are graphed together, the point in which they intersect is called the biological rotation age. The biological rotation age is the age in which a stand should be harvested to maximize long-term yield.
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As a result of the 2008 financial and mortgage crisis, a hefty 5.8% increase in COLA was applied in 2009, the most significant increase that Social Security benefits had seen since 1982.
If Congress hadn't blocked annual cost of living adjustments since 2009, rank-and-file lawmakers would be making $217,900 this year, according to the Congressional Research Service.