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Re: Public compost/Ammending Clay Soil

Square Foot Gardening List - http://myweb.flinet.com/~gallus/sqft.html

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No need to come all unglued about the horse manure / worms 
business.  Putting manure from horses who have been medicated for worms 
into the garden isn't exactly like dumping a contact insecticide on a bug 
(= sure and certain death).

I have no stats on how long antihelminthic meds remain potent in manure, 
but the composting process (and especially exposure to sunlight) breaks 
down most garden chemicals within months rather than years.  It is said by 
the fans of the popular herbicide Roundup that its active ingredients break 
down, on the soil *surface* in the presence of sunlight, into harmless 
byproduct compounds in 7 days, for instance.  [Critics of Roundup claim its 
byproducts are not harmless; I'm not including this info as any kind of 
endorsement....]

I'll ask about the issue of what proportion of horses get worming medicines 
at work.  We have some equine veterinarians who'll know about that.

--Janet
[working for USDA's Animal and Plant Health Inspection Service]


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