Red Alder Rootball Size

coastie coastie at
Fri Feb 16 16:04:44 EST 1996

Any thoughts on the size of a 20-30 red alder's rootball?
How much soil would these trees need to be healthy?
I am investigating an old landfill located in the NW.  It is covered with a stand of 
red alders.
I am trying to estimate how much soil it might have been covered with.
thanx for any thoughts

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