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Re: ?

1. Your State Geological Survey or Department of Natural Resources 
should have authoritative maps and figures (and their sources) on the 
actual land area of remnant native vegetation. The 0.1% figure sounds 
right. Also, a good estimate of the past extent of prairie might be 
arrived at by getting the figures on corn and soybean acreage, since 
it's mostly original prairie that has ended up with that present 
fate.

2. J.E. Weaver's work on uptake of precipitation by prairie in 
Nebraska is thoroughly researched, classic and still valid. It is 
reviewed in his book "The North American Prairie".



> Date:          Tue, 09 Mar 1999 18:03:19 -0600
> From:          Mary Jane Hatfield <oneota@ames.net>
> To:            Prairie L <prairie@mallorn.com>
> Subject:       ?
> Reply-to:      prairie@mallorn.com

> A friend asked me...
> 
> "I had a message from a woman asking for documentation (a
> source to site) for the statements :
> 1- Native prairie soaks up ~12 inches of precipitation/hour ---
> 2- less than 1% of native prairie is left in Iowa
> the number I usually hear is "less than .1 of 1% or less than 1/2 od 1%
> of Iowa's native prairie remains"
> I think how they define native prairie is important in backing the
> numbers-"
> 
> Can anyone be of help?
> 
> Thanks.
> 
> MJ Hatfield
> 
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> 
James C. Trager
Shaw Arboretum
P.O. Box 38
Gray Summit MO 63039
PH# 314-451-3512
FAX 314-451-5583
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