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  • From: "Scott Williamson" <ScottW@acespower.com>
  • To: "North American Fruit Explorers" <nafex@lists.ibiblio.org>
  • Subject: Re: [NAFEX] soil ph
  • Date: Wed, 10 Oct 2007 12:51:48 -0400

I think most of the sawdust used for animal bedding is fresh from the mills and that doesn't even contain walnut sawdust because horses are pretty sensitive to it.  At least that's the story I've gotten from the mills I've talked to.


From: nafex-bounces@lists.ibiblio.org [mailto:nafex-bounces@lists.ibiblio.org] On Behalf Of John S
Sent: Wednesday, October 10, 2007 12:35 PM
To: North American Fruit Explorers
Subject: Re: [NAFEX] soil ph

Jerry,  A question that came to my mind when I read your post was the source of the sawdust.  I would want to make sure that the sawdust did not come from treated lumber before using in compost.  Older treated lumber used asenic, but more recently, treated lumber uses a copper based form, which is less toxic.  I would not want to add asenic to any food crop's soil, even though there is always the question of whether that plant would take it up and it would appear in the fruit.
 
Perhaps one of the experts here could comment/
 
John

Jerrydana5@aol.com wrote:
I posted a question yesterday about lowering ph in my soil which has a fair amount of clay, tho not tons. I had used horse manure, horse bedding actually, which contained manure and absorbed urine, in a sawdust base.  I do not know what the sawdust was from.  I had the soil tested at the local farm bureau, and it was quite fertile, but too basic.--ph of 7.5.  The person doing the testing said it was probably due to the horse urine, which would decompose to ammonium hydroxide, which, of course would be basic.
 
I had read another post, which prompted my question, about adding gypsum to soil to loosen up clay (which is really not that necessary for me as it tills up quite nicely) but which also lowers ph.
 
So here are my questions:
1.  Does gypsum really lower ph?
2.  Do pine needles lower ph?  I've heard they do,  but one person say no way.
3.  Are compost and sulfur the best way to go?
4.  Does horse urine really make soil acid, as several have said?  I'm surprised at that.
 
Thanks for all your help!   Jerry in southern Indiana




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