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In forestry, periodic annual increment (PAI) is the change in the size of a tree between the beginning and ending of a growth period, divided by the number of years that was designated as the growing period. [1] For sigmoid growth, the graph of PAI increases rapidly and then quickly declines, approaching zero. PAI may go negative if a tree ...
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 ...
Current annual volume increment culminates sooner at closer than at wider spacings. A smaller espacement trial, begun in 1951 near Thunder Bay, Ontario, included white spruce at spacings of 1.8 m, 2.7 m, and 3.6 m. [97] At the closest spacing, mortality had begun at 37 years, but not at the wider spacings.
Forest inventory is the systematic collection of data and forest information for assessment or analysis. An estimate of the value and possible uses of timber is an important part of the broader information required to sustain ecosystems .
Maintaining record of forestry clearance issued for Land allotment ( Kidu, substitute), lease, transmission & telephone lines, Road, etc. Preparation and submission of quarterly/annual report of Land/Transmission and Roads. Maintain records of Stone and sand quarry. Correspondence and maintain records of Wild life and NWFP.
The following outline is provided as an overview of and guide to forestry: Forestry is the science and craft of creating, managing, planting, using, conserving and repairing forests and woodlands for associated resources for human and environmental benefits. Forestry is practiced in plantations and natural stands. The science of forestry has ...
The UN Strategic Plan for Forests 2017 - 2030 features a set of six Global Forest Goals and 26 associated targets to be reached by 2030. One important target is to increase forest area by three percent worldwide by 2030. [21] The Global Forest Goals Report 2021 drew on quantitative and bio-physical data primarily from FRA 2020. [22]