Ahmed wrote:Christophe, you did not specify the kind of "fir" ... (it looks like, in view of the photo, spruce ...).
Yes I also look for spruce!
Ahmed wrote:Christophe, you did not specify the kind of "fir" ... (it looks like, in view of the photo, spruce ...).
Softwoods are to be avoided because of their specific lignin (10 to 20% are however tolerated as a mixture). The resin does not have an aggressive character because it consists of derivatives of diterpenes (rosin part) and monoterpenes (turpentine part). It should be noted that only the genera Pinus, Picea, Larix and Pseudotsuga have resin channels. Cedars are characterized by constituents of heartwood toxic to microorganisms, derived from tropolones (thujaplicins) with a phenolic character, and are therefore prohibited in the BRF.
The acidification of soils by BRF is sometimes feared by some but it is an effect that has never been observed. On the contrary, in acidic soils, the deciduous BRF all have more or less tendency to increase the pH.
GuyGadeboisLeRetour wrote:Softwoods are to be avoided because of their specific lignin (10 to 20% are however tolerated as a mixture). The resin does not have an aggressive character because it consists of derivatives of diterpenes (rosin part) and monoterpenes (turpentine part). It should be noted that only the genera Pinus, Picea, Larix and Pseudotsuga have resin channels. Cedars are characterized by constituents of heartwood toxic to microorganisms, derived from tropolones (thujaplicins) with a phenolic character, and are therefore prohibited in the BRF.
The acidification of soils by BRF is sometimes feared by some but it is an effect that has never been observed. On the contrary, in acidic soils, the deciduous BRF all have more or less tendency to increase the pH.
https://fr.wikipedia.org/wiki/Bois_ram% ... ment%C3%A9
Did67 wrote:GuyGadeboisLeRetour wrote:Softwoods are to be avoided because of their specific lignin (10 to 20% are however tolerated as a mixture). The resin does not have an aggressive character because it consists of derivatives of diterpenes (rosin part) and monoterpenes (turpentine part). It should be noted that only the genera Pinus, Picea, Larix and Pseudotsuga have resin channels. Cedars are characterized by constituents of heartwood toxic to microorganisms, derived from tropolones (thujaplicins) with a phenolic character, and are therefore prohibited in the BRF.
The acidification of soils by BRF is sometimes feared by some but it is an effect that has never been observed. On the contrary, in acidic soils, the deciduous BRF all have more or less tendency to increase the pH.
https://fr.wikipedia.org/wiki/Bois_ram% ... ment%C3%A9
Yes, I think that sums it up well.
It is certain terpene derivatives that pose a problem (except, as Ahmed writes, if it is a question of making a comfortable aisle). Remember that these terpenes, turpentines, etc. are the basis of certain "cough" (or anti-throat irritation) sweets.
But in the long term, certain specific organisms get the better of everything: bark, thuja, cypress, etc ...
It also remains that we call "BRF" a bit of anything and between the one who crushes branches with a lot of needles, and the one who crushes "bare" branches, the result will not be the same.
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