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David Humphries

Managing Trees with Decay & Dysfunction

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Unfortunately for this one I'd say around 40%, but that was mainly due to the target area beneath. We left much of the side growth as a Trade off for the top as its a woodland edge tree. The tree shows great vitality with a lot of inner epicormic growth to hopefully take on the new canopy. The client is keen to manage this vital habitat tree which is great so hopefully we can monitor and report back with the results.



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A veteran field oak (image from 2014) that was showing signs of decline and natural retrenchment due to a number of successive drought years coupled with the local soil type and topography.




As well as the natural decline, the tree roots were about to be subjected to threat of compaction due to a forth coming large construction project that was going to last for 2 years.


We decided that a canopy reduction and root protection area was in order to try and mitigate for the potential stress.








The construction project ended last October and the tree looks to have come through it ok and is now reiterating a denser canopy.









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How did you calculate the RPA David? Standard BS5837 or plus some?


Standard 5837 based on the dbh


We would have liked to have gone x15, but space for excavation and other ground works meant we were pinched back to minimum RPA.






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Would have been a interesting candidate for before and after leaf chlorophyll fluorescence testing.


Yes it would have been interesting Gary, but having talked to a couple of people who have done this on veterans, I get the impression that CF is quite difficult to ascertain over and within a complete canopy on older trees. Too many variables, like leaf size, sun and shade leaves, root section vitality etc.


Probably better suited in monitoring and maintaining newly planted or young trees.






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