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Typha and Phragmytes

---------- Forwarded message ----------
Date: 11 Jun 1997 10:19:37 +0000 (GMT)
From: Feidhlim Harty <stce8039 at bureau_ucc.ie>
Subject: Typha and Phragmytes
To: Aquatic-Plants at actwin_com

I have a query that you may be able to help me with...

I have Typha angustifolia dying off in a wetland with slurry and silage
effluent entering it.  There are also Phragmytes there which are growing OK.
Following a hunch...

at what concentration of nitrates do Typha and Phragmytes respectively
become poisoned?

If you could answer this it would be great

Thank you