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iron content of soils
- To: Aquatic-Plants at actwin_com (Aquatic-Plants)
- Subject: iron content of soils
- From: "David W. Webb" <dwebb at ti_com>
- Date: Tue, 30 Dec 1997 15:23:14 -0600
- Conversation-Id: <BMSMTP88351664893a0206807 at dsks52_itg.ti.com>
>Date: Tue, 30 Dec 1997 01:43:49 -0800
>From: Stephen Pushak <teban at powersonic_bc.ca>
>
>Dave Gomberg's comment prompted me to triple-check my references on the
>iron content of soils. My numbers come from an article in TAG vol 6:4 in
>by Diana Walstad entitled "Iron: The Limiting Nutrient for Algae?". She
>said:
>
> "Iron, silicates and aluminum are the major components of mineral
>soils, with iron the fourth most abundatn element in the earth's crust.
>(Bowen, Brand). The total iron content varies from 1 mg/g soil in some
>leached sands to over 3000 mg/g in some tropical soils such as laterite
>(Wild).
I'm a bit confused here. Is mg/g a ratio of the number of milligrams of
iron per gram of soil? if so, then 1 mg/g is equal to 0.1% Fe in soil, but
3000 mg/g is equal to 300% Fe in soil. I'd call that supersaturated. ;-)
Either I'm missing something in the translation, or something is incorrect.
Might it be mg/kg?
--
David W. Webb Texas Instruments
(972) 575-3443 (voice) http://www.dallas.net/~dwebb
(214) 581-2380 (pager) 2145812380 at alphapage_airtouch.com