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David Humphries

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Everything posted by David Humphries

  1. David Humphries
    we had a thread or two about this, did you miss it? http://arbtalk.co.uk/forum/ecology/54481-vetree-2.html .
  2. David Humphries
    To try an avoid the above we've covered the exposed roots in the second trench with coir fibre and plastic before the trench is lowered down to 1m This should help reduce/deter further impact damage. .
  3. David Humphries
    Although we're monitoring the excavation (between other jobs), the mini digger is only as delicate as the hand that operates it. The digger driver on this job has done a decent job of digging down and past the highlighted roots in the first trench, but the retained roots have suffered some level of collateral damage. .
  4. David Humphries
    Cheers, I'll be sure to pass it on Thanks Guy, appreciate that comment. I guess its exactly what these forums are for. The shared experiences (good & bad) help us all move on to a better place. .
  5. David Humphries
    Interesting mix of programs, thanks for the heads up .
  6. David Humphries
    Lapsed boundary oak pollard that's growing weighted toward the adjacent mansion flats. Top of the bolling has the associated removed pole cavities you tend to find on old pollards.. Fistulina hepatica in attendance too. Big of a scramble for Jack, but thought he acheived a fine piece of work. Will proscribe a further reduction in about 5 years. .
  7. David Humphries
    Smart parade in Newmarket today, young Humphries in with the scouts. Nice to see a community paying its respects .
  8. David Humphries
    .
  9. David Humphries
    A short piece in the NewStatesman by Richard Mabey The queen beech ruled the land, even when she fell .
  10. David Humphries
    Thanks for the explanation Joe .
  11. David Humphries
    I was thinking that too sean, sounds like a significant loss of a niche habitat and cultural landscape. What's the reason for the clearance Joe? .
  12. David Humphries
    Cheers mate, kind of you to say, but Matt and his equipment are several levels above my eye and hard wear. I wish someone had inspired me to have chosen a career in photography twenty years ago. Working around trees does give us a great natural eye for a good shot set up though don't it ! .
  13. David Humphries
    Ha, the muffled husky voice was me being excited talking about Mycorrhiza ! .
  14. David Humphries
    not entirely true Guy, some UK practitioners were (and still are) using static bracing. The one below being one of a number at at Burnham Beeches..... I personally don't think the invasiveness is a big deal (on certain tree species) what puts me off is the time and handling aspect ! Like the last couple of images Matty .
  15. David Humphries
    There you are knees deep in a trench happily airspading away, when you get not one but two calls from Arbtalk members .
  16. David Humphries
    2nd phase of the trench today, only one underground service to keep an eye on which was at the edge of the path. Soil less compacted this end, so Air spade danced along uncovering more roots than the other end of the re-route. .
  17. David Humphries
    1 or 2 here....... http://arbtalk.co.uk/forum/picture-forum/15782-today-s-sunset.html .
  18. David Humphries
    Autumnal blanket in London .
  19. David Humphries
    I would agree, Ganoderma sp It's decurrent attachment 'might' suggest G. australe, but microscopy would be needed to confirm via spore size. .
  20. David Humphries
    A large number of Clouded funnels (Clitocybe nebularis) forming in 'fairy rings' around birch and rhododendron. .
  21. David Humphries
    Historically storm damaged beech with Pholiota aurivella fruiting from a cut stub surface on one stem and Fomes fomentarius fruiting from the bark on the other stem. .
  22. David Humphries
    Looks interesting, thanks for the heads up. .
  23. David Humphries
    Hi both, thanks for the input. Should have said yesterday that we (have copies) and had looked at both BS 5837; 2010 and the relevant NJUG doc but there's little (seemingly nothing) in them, specifically regarding hazards associated with using 'compressed air' in proximity to underground services. (if at all there is any?) I met the National Grid contractors on site this morning to set up the monitoring system before they start using the mini digger, and although they have access to soil picks they seemed unaware of any guidance except relevant PPE whilst using them. I haven't got a copy of the Tree Roots in the Built Environment at hand so I'll have a butchers at a colleagues at some point soon. If there's anything relevant I'll feed it back here. Thanks again Cheers Guy, certainly interested if there is anything from the States .
  24. David Humphries
    from our experience we've found that fine roots (and associated mycorrhiza) can be torn away from the parent root by the force of the compressed air and it can also dislodge stones (& other debris) which can cause impact damage to other roots. But generally, the air doesn't rupture through the root bark on mature roots. With care, this level of damage can be limited, and the fine root hairs can regenerate over a short period of time. Particularly in loosely compacted soils. This below vid shows the airspade/root interface at relatively close range (from about 2.40 secs) [ame] [/ame] .
  25. David Humphries
    Although we've used the airspade to uncover roots before we hadn't worked near to known underground services. On top of our own generic & site specific R/A's and SSoW the only guidance we could find on carrying out work on or near underground services was the HSE document HSG47 (2014) 'Avoiding danger from underground services' Avoiding danger from underground services - HSG47 Does any one else know of any further docs available on the subject? .

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