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Re: Acid scarification?

Tom,
Any chance you could post the link for the database for us ?


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: From: Tom Clothier <manytimes@anet-chi.com>
: To: seeds-list@eskimo.com
: Subject: Re: Acid scarification?
: Date: 11 February 1998 16:01
: 
: 
: From: Christopher P. Lindsey <lindsey@mallorn.com>
: 
: >I have a question about acid scarification.  A couple of the trees
: >that I was going to try growing (Cercis and Koelreuteria) require
: >acid scarification.  Fortunately, I was able to get my hands on (not
: >literally, of course) some sulfuric acid concentrate.
: 
: >What do all of you do?
: 
: While Michael A. Dirr recommends acid scarification for many of
: the woodies that he worked with, Norman C. Deno advises very
: strongly against the use of acid on the grounds that it is dangerous
: to use, and that the temperature, time of exposure, and concentration
: level are species dependent and difficult to manage outside of the
: laboratory.   For any seed to imbibe moisture, the scarification
: technique used is not a specific requirement , as long as it is
: successful (in my opinion).  Therefore, if a soaked seed refuses to
: swell for me, I use another method of abrading, and another, etc.
: and when all of those penetration techniques have failed, then I
: simply sow the seed outdoors where the patient abraders reside.
: 
: Prof. Deno does cite some references to the stimulation of germination
: by nitrogen compounds, and to that end, my seed soak does include
: one teaspoon per quart of kno3 (potassium nitrate).  I don't make any
: claims for it, but if activity within the seed coat is the only clue to
sowing
: readiness for seeds with impervious coats, anything which could
: stimulate that visual change is useful to try.
: 
: The (Asle & Tom) perennial seed germination database has just been
: updated to include more than 1700 species (and cultivars).  It is now
: presented in three separate pages of relatively equal length to reduce
: loading time.
: 
: manytimes,
: tom
: zone 5a, NE Illinois, -21ºF Min
: http://www.anet-chi.com/~manytimes
: 
: 
: 
: 
:
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