Planting where you burned a large brush pile

marc5(6aOH)April 7, 2012

There is a very large brush pile where I plan to expand my pawpaw planting. I had hoped to burn it during snow cover this past winter, but it never happened, so I will burn during the next rainy day. I am wondering what problems the remnants in the soil from this burning may present to my planting. Will I have any problems planting there? Do you think it will raise the pH to a high level? Pawpaws like low pH. Should I spring for a soil test, or perhaps just spread some sulfur to low pH?



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Noogy(6 sw mi)

After you're done burning, use a flat edged shovel to remove the thin layer of ash.
I planted a pear on a similar site, though 5 years+ after burn, and it was the only pear that died out. It began drying out on top in the fall, began sprouting in February from the rootstock, I attempted to graft onto rootstock in late march, but cambium was dry-dead.
There are some benefits to using ash, but from what I've read it's best to apply sparsely as the lye in it is caustic and will burn.

I don't know what else could have been in the burnpile. Gypsum boards...

    Bookmark   April 8, 2012 at 7:52AM
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ken_adrian Adrian MI cold Z5

how big a burn????

a giant burn.. can actually change the structure of the soil itself ...


    Bookmark   April 8, 2012 at 9:54AM
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I vaguely recall reading that severe heating of some soils can lead to an over-availability of some nutrient element and toxicity problems. I think it was manganese but do not recall with confidence.

    Bookmark   April 8, 2012 at 1:22PM
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You are much better off chipping it and leaving there. That way you are sure you are improving the soil. It is reasonable to make sacrifices early for your trees.

    Bookmark   April 8, 2012 at 8:13PM
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I wish I had the resources to chip, but this is a huge pile--perhaps 25'x30' and 8' high. Much of it is honeysuckle we cleared, though some is gnarly wood too difficult to split and stack for firewood.


    Bookmark   April 9, 2012 at 11:01PM
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ken_adrian Adrian MI cold Z5

now thats a burn pile like mine.. lol ..

when i burn a pile like that.. its an 8 to 10 hour burn.. and my sand actually turns colors.. and crystallizes [probably not the right term] ..

i moved the pile once.. had no problem re-establishing grass ... provided i could get water out the 500 feet to the area ... so the soil cant be that bad.. but i probably wouldnt go planting $100 specimens out there ...

if you have that big of a pile.. i find it hard to believe.. you are so limited as to space ... that you have to plant right there..


    Bookmark   April 10, 2012 at 8:15AM
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What about burning it damp, even if it takes a few attempts? Make lots of useful charcoal for the soil. If you have hose water, thoroughly wet the pile, let the outside dry a few feet down and burn it, scorching the damp brush underneath. Do it again if need be. Never let the very hot flames or large coals to last long at ground level, spraying when it gets near there.

    Bookmark   April 10, 2012 at 9:13AM
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Bananas....I like the idea. That's sort of what I'm hoping to do when the next--if it ever arrives--rain storm hits. No hose water available. Hadn't thought about the benefits of charcoal.


    Bookmark   April 12, 2012 at 11:50PM
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Rather than ignite the whole pile at once and affect the whole ground area beneath it, I put in the extra work to start a smaller fire nearby and feed it with additional cut-up branches from the giant pile until the big pile all goes up in smoke. It takes a day to do, but I can use the exercise. That way your paw paw planting plans won't be replaced by an Ash tree.

    Bookmark   April 13, 2012 at 10:24AM
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