Showing posts with label Firewood. Show all posts
Showing posts with label Firewood. Show all posts

Sunday, December 1, 2024

Ready for Winter: Making firewood in Niiharu Citizen Forest

 


On November 19, Japanese Meteorological Agency issued 3 months forecast for December 2024 - February 2025. According to them, Yokohama would have ‘average’ winter. i.e. The temperature and the rainfall would be around the average of 1991-2020, the recent 30 years. In this world of “approaching +1.5°C,” this means we may not have a freezing winter. But winter will be winter, and we’re expecting such days will come. In Niiharu Citizen Forest, we’re busy making firewood. Actually, since COVID-hubbub, many people become enthusiastic about bonfires and barbecue outdoors, all year around. Niiharu Lovers often have enquiry if we’re selling firewood. Yeah, as we’re thinning and mowing for forest maintenance, we have inventory for the material. But it’s hard to promise a stable supply of firewood. So, we rarely sell it at our workshop. Even though, we use firewood during winter for stoves, and, yes, for baking bamboo charcoal (; my post for March 3, 2017). Almost every winter, we use up all the firewood we prepare during late autumn. Firewood cracking is an important task for Lover’s winter prep.



This year Niiharu’s Reineckea carnea had lots of flowers.
It
’s a short delight (for less than a week) of late autumn.
They do not have flowers anymore,
if you visit Niiharu now. Sorry!

Some of you may have an experience using ax or machete. It requires certain skill to make firewood, doesn’t it? Especially when we need firewood used every weekend for at least 3 months, it’s a heavy task. Before, during our charcoal baking we wielded ax or machete on the go to cover the shortage of firewood. I confess I’m very bad at using ax. I aim, brandish the ax, swing it downward, and miss the target log … Sad. However! This year, Lovers get a tool for 21st century firewood making. It’s a motorized ax run by gasoline … er, well, a perverted thing in this world of Global Warming, just like COP meeting in petro-producing places … Anyway, the job done by this machine is certainly quick, and I can make good firewood. This is news, considering my skill level of making firewood, honestly. Let me show you how we’re doing it.

First, this is our material for firewood,



And here is the machine,

Set a log under the ax,


Put down the lever to lower the ax,

Done!

We (temporarily) store firewood here.

During the task, I found not only humans but also the other creatures were preparing for winter. When we cracked a log, lots of larvae made inside log their winter bedroom. Oh, so sorry to break your sleep in this way …

A larvae for beetle (sp.)

ditto!

This year, lots of Porostereum crissum sprouting …

Anyway, autumn this year is too short for Yokohama. *Sigh*


If you find a problem in the greenery of north-half of Yokohama, please make a contact with

Office for the Park Greeneries in the North
北部公園緑地事務所
Yokohama Municipal Government Green Environment Bureau
横浜市みどり環境局 
Phone:045-353-1166
FAX:045-352-3086
mk-hokubukoen@city.yokohama.jp

Friday, May 21, 2021

Don’t be greedy: firewood and shiitake mushrooms in Japanese forest

 


Once upon a time, forest was indispensable place for daily life in Japan. Reason: it was the place where people procure fuel. Before the life with fossil fuels, Japanese gathered firewood from forest nearby. When forest was out of reach, like for the city dwellers in downtown, wood and charcoals were something expensive but indispensable necessity to buy. Forest was precious for survival. Such days lasted until the mid-20th century, about 70 years ago. We can still find the remnants of yesteryear’s usage of forest in Yokohama. The easiest sign is large marks of coppicing here and there in the forest near us.


The way people harvested firewood was thinning. In Yokohama, popular species for firewood were oaks, like jolcham oak (Quercus serrata) or sawtooth oak (Quercus acutissima). People planted oaks in their land and waited. From a seedling to be a nice-sized tree for fuel, it took about 15 or so years. After thinning, oaks will sprout basal shoots from the stamp so that the scheme could continue for a loooooooong time without new planting. When you have “self-sufficient” size of land, you plan your afforestation from a patch to another, and stagger thinning from year to year. “This year we harvest our firewood from area A, next year from area B.” It was an efficient, economical, stable, and sustainable strategy for securing household energy. The oak logs obtained was about 15 to 20cm in diameter that was a nice size to be fuel. And they have another usage. I mean, other than being firewood or doorstopper.

The typical sign telling this place was once a field for procuring firewood.
 Could you see large trees starting from the same root?
They sprouted after their predecessors were coppiced for fuel.
Their size says they did not have such chance to be firewood.
The landlord stopped doing this long ago.
The left-over shoots eventually become large trees of some 50cm diameter.

Abandoned old oaks can easily a pray for Japanese oak wilt.
The City cut a part of this sawtooth oak in a park
to avoid them falling over the head of strollers.

These days, almost all mushrooms we find in Japanese supermarket are cultivated version. I would say they are “manufactured” on mushroom bed in sterile room for controlled “factories.” That’s true for many species of fungus, including shiitake mushrooms. The 21st century cultivation methodology guarantees us steady and cheaper supply of shiitake mushrooms all year around. That’s a very good news, yeah. Though, factory-made shiitake mushrooms lack something … the robust earthy flavor, maybe. Shiitake mushrooms are important ingredient for Japanese (and beyond) cuisine. Japanese were searching for the way to cultivate Shiitake mushrooms since the 17th century. Unlike white mushrooms whose cultivation technique was found in the early 18th century, for some time Japanese way to cultivate Shiitake mushrooms was “Spare robust logs of oaks out of a pile of firewood, scratch the surface of a wood with machete, leave it in humid shade of forest, pray for seed fugus to dwell on the logs, and miraculously Shiitake mushrooms sprout.” That was a gamble, but significant usage of oak woods besides for firewood. Granted, their taste might be less profound than the true wild shiitake mushrooms, but definitely more flavorful than factory version. Actually, to harvest tastier shiitake mushrooms from forest, we are still using somehow improved traditional method of using oak logs for firewood.

A factory version in our fridge.

These days we don’t have to play roulette for seed to come to oak logs. Fungus seed of Shiitake mushrooms are commercially available. Using the seed, many Japanese mountainous communities are competing each other to supply Shiitake mushrooms “with more robust taste than factory-made ones.” They inoculate oak tree logs with fugus seed, put them neatly in humid shades of their forest, water them in a controlled way, and harvest the product. In all the agricultural experiment stations in Japan researchers are busy to establish the best way to have the top-quality Shiitake mushrooms in forests. Which oak species are the most suitable for the best Shiitake mushrooms? The size of tree? Where and how long to leave them in a forest? The microclimate of the site? Temperature? Moisture? Intensity of sun light? Air circulation? Etc. etc. Nowadays shiitake cultivation is the main usage of coppiced oak trees of 15 to 20 years old. When you hike mountains in Tanzawa, Hakone, Sagamihara, you may find farmers sell their Shiitake mushrooms. They are from the woods planted seeds of fungus.

The old “site” to put inoculated oak tree.
 Hmmmm … here the trees are almost spent …

Actually, fungus seeds are readily available in our nearby home improvement centers together with logs. We, forest volunteers as Lovers of Niiharu Forest 新治市民の森, annually inoculate oak logs with shiitake seeds to utilize the woods produced during our forestry activity. We drill holes on appropriately sized logs from our weekend, hammer the fungus seed from home improvement store, and voila! Here is the Shiitake mushroom bed. The season to inoculate Shiitake seed in Yokohama is spring. It takes roughly one year after planting the seed for Shiitake mushrooms sprouting. i.e. The season of “natural” Shiitake mushrooms is spring. During the whole process, we keep the seeded woods in nice shade where it is humid enough for the bed to supply sufficient nutrients for fugus to be mushrooms …

This is shiitake mushroom seed.
 Moist sawdust is molded into a peg about 0.8cm diameter
 and injected lots of shiitake seeds (fungus).

Woods from thinned oaks are drilled holes
here and there for the seed to be inserted.

The seeds are inserted to the holes.
 Now, lets strike them!

One weekend of this spring, Niiharu Lovers engaged in the annual task of “giving shots” to oak woods. I am learning the skill to embed mushroom seeds on logs … Practice, practice, practice. We must strike the mushroom seed vertically and securely but not too strongly. After planting the mushroom seeds, the members of Association of Lovers for Niiharu Citizen Forest can buy inoculated logs at reasonable price. I’m purchasing one wood per year for a shady corner of our family garden. Surely, they sprout Shiitake mushrooms every spring. 😊😊😊 This year, a senior volunteer advised me. “Naomi, you’d better carry a larger wood. They will provide nice harvest. The value for money, you know.” Hmmmm. Skinny logs are easier to move to shady places, but the nutrients from such seed bed are smaller. In order to expect 4-5 years of steady harvesting of shiitake mushrooms, we should choose logs of larger diameter ... I took the advice. I chose a 50cm wood in 20cm diameter.

The inoculated wood.
It’s better not to squash the seed.

That was … a true adventure with shiitake mushrooms. After saying see-you-next-week, I carried the log by arms. (I’m commuting Niiharu Forest on foot.) After 500m or so of walking my arms started screaming. Hey, you fool! You must know how heavy a log of sawtooth oak of this size. You become greedy, and now this phenomenal burden … Next Monday morning, I had a serious problem in maneuvering PC … Lessons learned. I keep crossing my fingers for reasonable pay off from my new wood with shiitake mushrooms.




If you find a problem in the greenery of north-half of Yokohama, please make a contact with

Office for the Park Greeneries in the North
北部公園緑地事務所
Yokohama Municipal Government Creative Environment Policy Bureau
横浜市環境創造局
Phone: 045-311-2016
FAX: 045-316-8420

Niiharu Administrative Office / Satoyama Exchange Center
新治管理事務所・里山交流センター
Phone: 045-931-4947
Fax: 045-937-0898
Email: info@niiharu.jp
http://www.niiharu.jp/

Friday, November 23, 2018

Light My Fire: fire woods in Niiharu Citizen Forest



November. Late autumn. Deciduous trees are shedding their leaves. Winter is coming. A tiny office of Lovers of Niiharu Citizen Forest 新治市民の森 uses wood stove for heating. Lovers also have Autumn and Winter festivals for kids to play in our forest. A camp fire is always very popular. And of course, charcoal baking season is approaching rapidly. So, Lovers are checking if we have enough supply of firewood for winter. As Niiharu Forest is large, we Lovers take a sort of laid-back approach for the supply of firewood. During year-round activities, we produce lots of thinned trees and pruned boughs, you see? On the other hand, the City asks us to gather woods created by forestry as much as possible in a defined area, and waste collectors sent by the municipality regularly come to pick them up there. Majority of the woods are carried to a recycle plant next to Yokohama Zoorasia, where the thinned trees of Niiharu become wood chips for mulching in the city parks and gardens. This autumn, the collectors came early November and cleared the depo rather impressively. “Heck, we don’t have enough firewood for Kid’s Day, or for winter.”


We need firewood for winter!


Luckily (or not), typhoons this September destroyed many large trees. Lovers and the City cleared them when they could threaten the safety of visitors to the Forest. The logs are still lying on the forest floor. The amount of the trees processed since September would provide enough firewood for once a week activity of Lovers? We entered in the forest to drag them out for firewood. Several tall cedar trees were broken by strong winds, and now their trunks are chopped in about 2m long with their boughs. BUT “Coniferous trees are not good. Their tissues have relatively rough texture and oily. They burn rapidly, with smoke.” “Yes, so, Naomi, collect the boughs of deciduous trees, if you can. Quercus acutissima or Quercus serrata is the best, yet we don’t have to be that picky in the end.” Roger. Coniferous trees are straight, and so their logs are simple enough to drag in the mountainous road. In contrast, deciduous trees have lots of curves and knots that could be stuck in bumps and roots of the other trees spreading over the forest floor. Tagging, lifting, tilting … dragging woods is not at all a simple activity, I tell you. That was a very good weight-lifting training!


An ideal candidate to be firewood;
 a broadleaved tree destroyed by a typhoon.
In the end we demolished this country hedge:
 it was relatively drier than newly damaged trees.


In any case, cut trees are not easy to set fire. For roughly 60 days between September and now in November, Yokohama has had rainy weather. The woods are damp and difficult to be ignited. We went in the forest of cedars to collect leaves that contain oil, i.e. suitable as tinder. Cedars shed their leaves as they grow, by dropping branches with leaves, which makes them easy to deal with for campfires. “Collect those newly dropped ones. Leave older branches on the ground. They can cover the floor and prevent run-off of the soil when it rains again.” Certainly. Actually, this task was easy compared with dragging the logs from the mountain. I recalled a description of girls’ life 100 years ago in Kanagawa Prefecture 神奈川県, reported in “Verbatim Record: traditional meal of Kanagawa Prefecture 聞き書神奈川の食事 (1992)” There, an old lady from Atsugi 厚木 described her childhood. During autumn, she entered in a forest afterschool almost daily. It was not for play. She collected fallen leaves to provide enough tinder for her household. Their activity practically cleared the forest floor to receive enough sunshine, which was ready to have spring ephemeral. Now, no one does it, and I as a Lover of Niiharu did a tiny tidying up. I don’t think mine was a match with the jobs 6 years’ olds did 100 years ago …


Lots of tinder in a forest floor of cedars.


Even Niiharu Forest of rainy Yokohama has experiences of forest fires, it seems to me. About 15 years ago, the area had thunderstorm, and a lightening hit a cedar tree and ignited a fire. It did not spread much, and now a charcoal tree is standing near a trekking route of the Citizen Forest. I guess when we have lots of ever-green broad leaved trees with lots of rain like in Niiharu, the place is relatively resilient to forest fires. Though, they say if we do not manage forest properly, e.g. leaving dead trees and bushes too much, and neglect the place which invites mischiefs acting carelessly with fire, dry weather can bring a devastating fire. It happened for Gun’ma Prefecture 群馬県 in April 2014 ... Fire and woods are the things like two sides of a coin, at least for humans. Before the age of petrochemicals, one of the reasons Japanese treasured forests was as suppliers of fuel. Now in Yokohama, not many people enter forests to gather woods for fuel. Petros make forests like Disney Land, a place to visit if you want to have (mainly) passive fun for pastime. Forests are something people can think to live their life without it … Thanks to this, Japan does not have serious problem of BaP originating from burning woods for household usage (; the smog with PM2.5 from the neighboring continent is totally a different matter, as you can check it here). I found something unsettling here … Fuels, woods, neglected forests, improvement in air quality of a city … Cognitive dissonance?




Disclaimer: nobody is allowed to make fire in Yokohama’s forest, being it in a Citizen Forest or not, without a permission from the fire station in charge of the area. The Lovers of Niiharu Citizen Forest submit necessary papers and receive on-site checkings by officers. We also follow the direction of the authority to control the fire. In addition, members of the Lovers who live next to the forest join the sentry activities organized by neighborhood associations, and patrol Niiharu Citizen Forest in evenings. Preventing forest fire is one of the most important activities for this night watch. We try to be responsible about the relation between forest and fire in Niiharu Citizen Forest. I keep crossing my fingers Niiharu Forest will not have a serious fire incident …




If you find a problem in Niiharu Forest, please make a contact with

Office for the Park Greeneries in the North 北部公園緑地事務所
Yokohama Municipal Government Creative Environment Policy Bureau 横浜市環境創造局
Phone: 045-311-2016
FAX: 045-316-8420

Niiharu Administrative Office / Satoyama Exchange Center 新治管理事務所・里山交流センター
Phone: 045-931-4947
Fax: 045-937-0898