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nafex - Re: [NAFEX] Pine trees and soil acidity

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  • From: "del stubbs" <pinewoodel@hotmail.com>
  • To: nafex@lists.ibiblio.org
  • Subject: Re: [NAFEX] Pine trees and soil acidity
  • Date: Thu, 23 Oct 2003 12:55:33 +0000

This discussion is timely for me, background:
Our farm is on clay hills, not a blueberry in site, mixed hardwoods and hay.
Four years ago I dug out a chunk of a clay hillside and replaced 18" of soil with thirds each of sphagnum, sand and garden soil. Planted 3 kinds of northern hardy low bush blueberries for my wife (who grew up picking wild ones). I even added sulpher acidifiers. Most have died or grown so poorly they are still 6" tall.
So I took some good nafex advice and bought a bunch more, planted them in the deepest organic matter soil we have at the bottom of a swail, a small alluvial fan of sorts, though well drained, soil about 16" deep.
The neighbors, only a mile away are in pure sand, lots of jack and red pine, so shortly I was going to go there and get a couple loads of old and new pine needles to spread on top of the soil around the new blueberries.
I would guess the idea that this will acidify my soil is more from young and old husbands, than older wives.
I have access to pine shavings as well as oak leaves.
Pine needles, oak leaves, pine sawdust, rotted logs.......it is starting to sound all the same,
Any more clarification to guide my mulch gathering?
Thanks, Del n. MN z 2/3






Del Stubbs www.pinewoodforge.com ag zone2/3








From: Jim F <bonfire58_2000@yahoo.com>
Reply-To: North American Fruit Explorers <nafex@lists.ibiblio.org>
To: NAFEX@lists.ibiblio.org
Subject: [NAFEX] Pine trees and soil acidity
Date: Thu, 23 Oct 2003 04:57:14 -0700 (PDT)

It would appear that I should have added more subject matter to my letter about pine needles and soil acidity: Needles from conifers do not make their soil acidic, however, these plants are extremely adaptable and will thrive in almost any soil, even in soil that is so acidic that nothing much else will grow there. If we add lime to soil, the pH may rise and the pines will still thrive.
It is a shame that whomever started the rumor about needles and acidity failed to test the needles to verify the hpothesis because needles are such a wonderful mulch! Needle are slow to get wet and, so, allow most rainwater to penetrate down to the soil, whereas, most other mulches need to become saturated before the soil gets wet. A second 'plus' is that needles are slow to break down so the gardener doesn't necessarily need to keep adding every year.
A third point comes in the form of complaints that little or nothing will grow under conifers. It certainly isn't because the soil is too acid. It is because the conifer canopy tends to shut out all direct sunlight from reaching the ground. Nothing(?) will grow because there is no sunlight to nurture life.
Jim Fruth
Pequot Lakes, MN


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