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Subject: Re: Sulphate of Potash
From: Greg Johnson <gjohnson@au.infogrames.com>
Organization: Ye 'Ol Disorganized NNTPCache groupie
Date: Mon, 21 Feb 00 09:27:10
Message-ID: <MOD$000220.4775@rec.gardens.ecosystems>
References: <MOD$000210.20485@rec.gardens.ecosystems>



Thanks for the info. I'll seek out the fish meal as a substitute.

Bill Robinson wrote:

> Greg Johnson wants to make a balanced fertilizer by spiking
> bone meal and blood meal with potassium sulphate. He asks if
> potassium sulfate is safe and organic.
>
> Commercial potassium sulfate is made by reacting sulfuric
> acid with potash. This material is not organic to say the
> least but it is not particularly destructive of the environment.
> Potassium sulfate is used in agriculture to correct potassium
> deficient soil. It is a salt and at conventional levels it
> is beneficial to plants.
>
> Potassium, like all of the other mineral nutrients, is an
> essential nutrient at one level but is toxic at higher
> concentrations. It doesn't take too much potassium sulfate
> to burn the roots.
>
> The thing I don't like about the mix of blood meal plus bone
> meal plus potassium sulfate is that it leaves out the needed
> trace elements. How's about adding generous portions of fish
> meal or fish emulsion - stuff from the ocean has got it all.
>
> Bill
>
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