Bio Char
There has been a great deal of excitement generated about
biochar, which I date back to when James Lovelock, (of Gaia theory), stated and
I paraphrase, that the greatest hope to avoid runaway climate change was to
make loads of charcoal and bury it. This of course resulted in quite a reaction
to say the least and as ever people divided into entrenched camps to argue it
out.
In case you don’t know, BioChar is not a new invention. When
the conquistadors were travelling up the Amazon in the mid 16th century
they found a civilisation lining the banks of the Amazon for mile after mile
and these people had made garden with rich deep soils mixing composts with
crushed charcoal which was called Terra Preta. These soils are mined to this
day by garden centres in Brazil and sold. The best book I have found on the
subject is called The Biochar Solution and is by Albert Bates, published by New
Society. Biochar is comprised of
charcoal, which is pyrolised organic woody matter, i.e. heated in the absence
of oxygen, so just like normal charcoal but this material is crushed and used
in soils after being prepared in a variety of ways. Albert Bates is very clear
that there a good and bad ways of making charcoal and the bad ways can be
damaging and polluting and so obviously do not fit into the ethos of the whole
reason to make it in the first place. Also that Biochar is not a panacea which
will ‘save the planet’ but, that as a way of building, particularly degraded
soils Biochar has a massively important part to play. Probably the most
important factor to realise is that building soil health, and sequestering
carbon in the soil through applications of composts and mulches and through no
dig techniques, are also incredibly valuable.
Charcoal is an incredible substance, just a fragment the
size of a rubber on the end of a pencil can have a surface area equivalent to a
small house. It is a sponge like structure full of pores, on its own it does
nothing to the soil but as Albert Bates says acts like a coral reef in the soil
harbouring an astonishing amount of microbial life by vastly extending the
surface area of the soil. Kilometres of fungal strands in a cubic centimetre,
and all the other kingdoms of life present in the soil, all the beneficial
bacteria, protozoa providing a richer food web in the soil and sequestering
carbon indefinitely.






ources and outdoor learning experiences, including seed-saving in school and Ofsted and school food. The event is FREE and with a free lunch.
The
Paignton Zoo will be running the first of their four
Dartmoor National Park and Devon County Council have funded a new project called
DEBI is inviting Devon schools to enter their annual environmental awards. Do you have a waste reduction and reuse policy in the school in which the students actively participate? Do you use renewable energy? Do you engage your staff and students in environmental best practice? Why don’t you nominate them for the DEBI 2015 Environmental Champion?
Every October sees primary school pupils from across the UK join forces with children in more than 40 countries worldwide to celebrate the benefits of walking to school - find out more
The Pod has two campaigns running for the new term:
We have now created a
Hopefully some of your Autumn crops have made it through the Summer holidays and you some produce to harvest. If you have a polytunnel there is still just time to plant out some winter greens such as
If your school has a food waste composter, such as a
Finally, in case you haven't already got one, here is a reminder to get your free copy of the
To prepare a new vegetable bed, or re-start a bed that has become a bit overgrown the lasagne method is really effective way of involving a group of pupils in the garden. Creating a lasagne bed involves mulching (covering) the soil and weeds with layers of cardboard, paper, compost and other materials such as grass clippings, to smother the weeds and add organic matter, ready to plant into in the Spring.
upper and lower KS2 packs include poetry lesson plans and address key literacy objectives. Both are FREE to teachers in Devon schools (excluding Plymouth & Torbay).
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Teachers have the opportunity to learn and share practical ideas via a
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