hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
New Trillium species discovered

Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

RSS story archive

Re: building up sand for iris culture
  • Subject: Re: building up sand for iris culture
  • From: Linda Mann <lmann@lock-net.com>
  • Date: Fri, 22 Jun 2012 19:03:21 -0400

Organic matter starts out with a lot of carbon compounds (carbohydrates etc) that fungi and bacteria 'eat', so basically something like 99% of it 'cooks' off pretty quickly as CO2 (respiration), leaving the hard to digest humic substances behind. Depending on climate (moisture & temp) and fertility (esp nitrogen), that can happen in just a few years. It's been more than a decade since I've had to know such stuff, but that's the ball park - horse poop or grass clippings, very little of it will be left after the soil critters get done with it. I'm trying to remember how many years it takes to cook down to resistant compounds in my climate, but am drawing a blank. Not long.

"Depending on their chemical structure, decomposition is rapid (sugars, starches and proteins), slow (cellulose, fats, waxes and resins) or very slow (lignin)."

So whatever you got that contains a 'high percentage of humic acids' ("high" relative to what?) could maybe be well aged compost? The longer compost 'cooks' (and I mean years or decades), the more what's left will be resistant to being cooked off once you add it to your soil.

On 6/21/2012 8:10 PM, SDAyres2@aol.com wrote:
 I found that in the desert, the
organic matter  added to sandy soil will eventually go away.  I am not  sure
where it goes.  Does it burn up, fall down through the soil or does it  get used

I find it interesting that compost is not high in humic acids.


To sign-off this list, send email to majordomo@hort.net with the

Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement