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Re: N-fixing trees



On Sep 13, 1996 11:41:35 in article <Re: N-fixing trees>, 'James Bomford
<jbomford@jbomford.demon.co.uk>' wrote: 
 
>Species:Alder, Alnus glutinous (fens and by fresh water) 
>Grey Alder, A. incana (drier places) 
>Green Alder, A. viridis (Mountains) 
 
A. incana will grow in wet soil.  All the alders are N fixing as 
well as valuable pioneers well suited to reclamation of mineral 
soils and bank stabilization.  Habits range from the shrubby 
(to 10') American Green Alder (A. crispa) to A. japonica which 
may reach 80'.  Most are fairly cold hardy, an exception being 
A. cordata.  Although short-lived they are useful on the farm 
as the wood is fairly durable in contact with wet soil.  Those  
in extremely cold situations may wish to look into the Himalayan 
exemplars.



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