by Joe Hillshoist » Mon Aug 21, 2023 7:22 pm
I have never seen an avocado, camphor laurel or eucalypt since he mentioned it, burn from a cigarette lighter. Seen plenty not burn with fire underneath them even if it kills off the leaves and they die a day or two later.
In fact that sucks because then they become a fire hazard next time, which could be a week later.) You'll see this when I figure out somewhere to stick these photos I took this morning of the fire site I mentioned, its opposite where my kids get on the school bus so i'll strip any meta data from them and then post them on some free file sharing site if anyone has one (I don't do facebook or any of that rubbish, never have so I have no idea where to upload photos online these days. I don't normally do it.)
At 14.30 he's showing a tree burned from the inside. i think its a blue gum (which could be one of several species of smooth bark gums) again this is not unusual. These trees have cracks and hollows in them and there is dead wood. if its hot enough for long enough from a ground fire they'll catch (and you can see the burnt ground around that tree) and burn up the middle. Sometimes they'll send sparks out the top, it looks spectacular at night but its dangerous, especially along a fire break or control line.
The tree can fall across control lines and start a fire in unburnt ground or send sparks and embers across the control line/fire break. For this reason we drop those trees. usually in serious fires we have big Dozers D7-9 and we tag trees that are a risk of this and the dozers come along and push them over into the side of the control line that will burn. It suck cos many of these trees are hundreds of years old, I hate doing it but not doing it means the fire can jump the line and then more trees, critters and potentially people die.
How the fuck does this guy say he's never seen a cavity in a euke before? We dropped a 40m tree on my neighbours place the other day, one of the many species of "blue" gum. Took three days to do it safely, next to his house, with harnesses, using an excavator modified to pull on limbs as we cut them etc etc. It was riddled with hollows. The poor thing had a trunk 2m wide at least. Again it was a horrible thing to do to a magnificent tree but it was poised to drop branches on his house. We call those trees widowmakers for a reason in this country.
Anyway, notice he says "burned from the inside out" ... he's talkking about surface scorching. There are photos he is showing where the wood has been cut and the wood inside the tree is not burned. Its yellow or light coloured. The charring is on the surface only. If it was some DEW, and I have no idea how they work but surely the make the entire area hot, I would think it would do more than just char the outside a little bit.
Meanwhile, time and again he says "no combustible materials on the ground". Well no shit... the ground is black and charred. They've been burned away. JFC. Don't give these people any of your money.
"Water activate electronically..." yeah mate, steam burns don't cause charring. Charring needs O2 and cooler burning.
Remeber earlier they're talking about white ash on homes, where is the black stuff? That's cos white ash is more completely burned than black ash. If you have a paddock and you want to burn it do it slowly, light at the top in one spot and let it burn coolly down the hill. You'll get lots of char (and more carbon kept in the char which means it goes back into the soil and not only mitigates climate change, provides structure and food for soil biota). Light it from the bottom and watch it roar up the hill and you'll have white ash, a much quicker burn, higher heat, the soil life won't have as much food and in many cases the flash of the heat will kill the soil life down to 3 or 4 inches.
Then you'll get weeds invading your paddock and lose your pasture.
In bad wildfires the soil can be burned several metres. this happened at Kinglake in 2009 (Black Saturday) and at times during the summer of 2019/20.