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Author Topic: Soil Chemistry  (Read 88 times)

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schmidling

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Soil Chemistry
« on: Today at 08:03:05 AM »

I have a soil testing kit that uses an "extraction" chemical and a "reactant" chemical to determine NPK values by comparing color of reaction to a color chart.

I have used up the chemicals for the Nitrogen test and would like to find out what they are.

Calcium chloride seems to work as the extractant but I am clueless about the reactant.

Any ideas?

Jack
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Arkcon

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Re: Soil Chemistry
« Reply #1 on: Today at 02:58:13 PM »

I've never seen a resource that listed what the reagents were for these soil testing kits.  I don't know how you're going to replace components without buying a new one.

Quote
Calcium chloride seems to work as the extractant but I am clueless about the reactant.

I have no idea how you know this, and it doesn't seem likely to me.

Here's a reference on the topic: 
http://horttech.ashspublications.org/content/17/3/358.full

Basically they compare a bunch of tests to a real chemical analysis, which you can order for a fee from a variety of places.  Results are better than the diy mix chemicals and compare colors.
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That all depends on how reasonable we're all willing to be.  I just want my friends back, except for Cartman, you can keep him.

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