Is there any literature or report that I can reach about the allowable cut methods that are currently being used in different countries? Since there are many methods or formulas, I wonder the situation in country or region base. Any information for a specific country is also welcome.
Dear Mr Zengin, Jerry Vanclay’s short, inspiring paper might be a good starting point http://jkv.50megs.com/AllowableCut.pdf
With a set of 4 international generic indicators for Criterion 5.2 and instructions for standard developers FSC addresses your question from a global perspective. You can find this in FSC-STD-60-004 on FSC.org in the Document Center.
I wonder myself, how the rule for the annual cut can be meaningfully calculated for cases, where many different and not well researched species are managed. Single-species AAC calculations make intuitively more sense to me in such cases. But I don't have field experiences. Looking forward to see your research findings later on.
Dear Marion,
thank you for the suggestions. I read the Vanclay's interesting paper and looked at some of the documents on country base on FSC.org which are very usefull. The book edited by Siry et al. about "Forest Plans of North America" is also a good reference. I hope to find more especially about formula methods in other countries.
Yield tables or growth models are generally for pure stands in Turkey and the situation in mixed stands goes on with some assumptions. On the other hand, forest inventory gives some idea about how much of the total allowable cut should be allocated for different species.
In india you can get hold of approved working ( management) plan of any forest division. The forest areas are divided into working circles depending upon the topography, edaphic conditions and crop composition and harvesting methods and computation of expected annual yields are prescribed along with post harvest subsidiary silvicultural operations.
there are books on forest management that contain the principles of computing annual yields of AAC for areas managed under different silvicultural system.
In the United States, allowable harvest is calculated on a case-by-case, landowner-by-landowner basis. Having firsthand experience working with the Bureau of Indian Affairs allowable cut calculations, I can share the following document (relevant information starts on page 31): https://www.bia.gov/sites/bia.gov/files/assets/public/raca/handbook/pdf/53-IAM-2H-Forest-Management-Planning-HB_OIMT.pdf. Generally speaking, one calculates the land available to the landowner for harvest (after removing areas that are off-limits to harvest like conservation areas, stream buffers, endangered species habitat buffers, etc.). Then, knowing the total amount of land that is available for harvest, it is important to take into account the silvics of the species that will be harvested, the goals of the landowners (purely economic or more diverse), and the ideal harvest cycle. If, for example, a landowner has a million hectares available for harvest after taking off-limits areas into account and wanted a 20 year harvest cycle, they would be able to harvest 50,000 hectares a year. There is a lot more to consider given the particular case, but this is my very general understanding of how land-management agencies in the U.S. calculate allowable harvest for sustainable yield.
At this time I don't know a specific document for a particular case on forest harvest, although I can make a recommendation for Good Practice on forest Management, do you can get in the following link GUÍA DE CAMPO MEJORES PRÁCTICAS DE MANEJO FORESTAL - PDF Descargar libre (docplayer.es) "GUÍA DE CAMPO MEJORES PRÁCTICAS DE MANEJO FORESTAL” the authors are
JORGE GA YOSO - MAURICIO ACUÑA
It usually varies between countries and within the country between different forest types and management regimes. See attached links:
http://jkv.50megs.com/AllowableCut.pdf
https://www.jstor.org/stable/pdf/42600439.pdf
https://www.nnrg.org/wp-content/uploads/2019/03/Guidance-for-FSC-Forest-Management-Plan.pdf
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