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The oneoak blog is part of the SYLVA Foundation blog which contains news about the organisation and all our initiatives.

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We are delighted to report that about 50 young oak seedlings have been raised successfully by Nicholsons, ready to be planted at the OneOak site this coming Winter.

If you have been following the story about the seeds so far, you will know that the OneOak tree did not produce any viable seeds in the Autumn before it was felled.  However, with the help of school children and the staff at Blenheim Palace we did manage to collect acorns (oak seed) from some of the wonderful ancient oaks around the Blenheim Estate.  These fifty oak seedlings have been skilfully raised by the nurserymen and women at Nicholsons during this summer.  We will need to bring in some additional 200 other oak seedlings ready for the planting of the site this Winter.   Every one of the 250 children who watched the tree being felled, and who have been working in so many other ways with us in the OneOak project, will soon be returning to the woodland to each plant one young tree.

Our thanks to Jane King for the photos, and our admiration to Nicholsons for their green fingers.

You can read more about the seed story by searching for ‘seeds’ in the search box.

In May we launched an online competition to Guess the Weight of the OneOak treeread more.

The competition closed at the end of August and we have one lucky winner who will receive a beautiful hand-carved bowl, made by master craftsman Martin Damen (see Martin Damen’s website).

The winning answer of 14.662 tonnes was only 277kg out from the correct answer of 14.385 tonnes (14385 kg).  Two runner up prizes will be presented, for the next two nearest guesses of 15.100 and 15.421 tonnes.

Foresters use tables to estimate the volume and weight of timber from a tree but these exclude the crownwood.  As you can see below, the crownwood actually weighed more than the tree’s massive stem; effectively 58% of the total weight.  This answer seems to have foxed even some of the best scientists who had a go at estimating the tree’s total weight.

The complete weight details:
Stem to timber height        6036kg
Branchwood to 7cm           6137kg
Branchwood 7 – 4cm          1000kg
Lop&top < 4cm                  1212kg
Total Wt                           14385kg

Thank you to Ian Craig and colleagues of Forest Research who worked tirelessly over two days in the cold and wet to weigh every limb, branch and twig of the OneOak tree, and who then completed some serious number crunching in the laboratories of Forest Research at Alice Holt.

Dendrologist Daniel Miles, of Oxford Dendrochronology Laboratory, has started work on the samples he collected from the OneOak tree when it was felled in January.  Work in studying the tree rings to estimate the tree’s age and to look at its growth history is not yet complete.  However, Daniel has revealed some stunning news:

  1. All slices have now dried out with this spell of warm weather, and radial sections have now been cut, and the surfaces have been planed and sanded to a very high standard of smoothness, essential to ensure every ring can be clearly seen and measured under the microscope.  Even so, there is a band of rings in the first large branch, 33 feet above the ground, which was found to be rotten.  This branch has had a very serious injury to it sometime in the past and had virtually died, with a band of exceptionally narrow rings which will be almost impossible to measure, let alone count.  This is the branch that they had hoped to use as a brace at the Wallingford Museum but was found to have a rot pocket when cut; this is directly related to this band of very narrow rings.
  2. Another interesting fact is that the preliminary ring count of the base of the tree, at one foot above the ground, is about 225 years, so the tree seems to have started growing shortly before 1785.

So, the tree experienced some form of major damaging event in its past, and it is about 65 years older than we thought.  The exact details have yet to confirmed but a planting date of 1785 or before would place its planting during the major landscape design phase of the Blenheim Estate undertaken by ‘Capability’ Brown.

In November we wrote about the children collecting oak acorns from the many beautiful oak trees around the Blenheim Palace Estate (read more here).  2009 was not a good year for oak seed collecting as very few trees had produced many acorns.  We had feared that even the 50 seeds that we thought looked healthy, still might not germinate.

Oak seedlings growing in the hands of Nicholsons

Oak seedlings growing in the hands of Nicholsons

Under the skillful watchful eyes of tree nursery Nicholsons we are all delighted that many of the acorns have germinated.  A new generation of OneOak trees are now growing strongly.

We will soon be planning the replanting of the woodland area where the OneOak tree was felled.  We will have to add another 200 or so oak seedlings to our own Blenheim seedlings, so that every child involved in the project can plant a tree.  The replanting will probably take place in February 2011.

Nature is repairing herself at the woodland where the OneOak tree was felled in January 2010.  Foresters at Blenheim Estate have also given nature a helping hand by leaving habitat piles.   Piles of branchwood have been left to provide homes for wildlife, for small mammals such as voles, and for insects and fungi that thrive on decaying and dead wood.  These piles of wood will also return essential nutrients to the soil and help the next generation of trees to grow.

When the massive OneOak tree was felled the woodland instantly changed.  The absence of the majestic spreading crown of the OneOak tree was stark although more winter sun warmed the woodland floor. Marks in the leaf litter from forestry tractors and hundreds of trampling feet were still visible two months later.

Now that Spring has arrived the transformation of the site is well underway.  Bluebells are in full bloom and the first fronds of bracken unfurling, even in between the tractor treads and around the stump of the OneOak tree.

We look forward to returning in the Autumn to plant the next generation of oak trees.  Click on the images below to see more.

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