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Article #343

Re: The use of inorganics

#343
From: Pete Lucas
Date: Thu, 16 Apr 1998 00:00
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Christopher Allen Schultz wrote:
> 
> It is true that the nutrients are the same, but let me give an analogy for
> what you are saying.  Inorganic fertillizers are dissolved in water,
> applied as water soluble solids or applied as gasses (ammonia injection),
> take a sieve add which ever inorganic nutrient source you wish and then
> add water.  Is there any fertillizer in your sieve?  That water on your
> shoes is called Groundwater, in some places groundwater pollution is a
> major problem.  Now take the same sieve add manure or compost and pour
> water through it.  This water is not cleaner, but contains less
> nutrients, plants are very good at abstracting nutrients from organic
> sources! Plants will preferencially abstract nutrients from the soil
> organics over the inorganic sources for a number of reasons,

Huuh? The nutrients have to be in solution before the plant
can do its' uptake; and how is the plant going to distinguish
between, say, a phosphate molecule from an "organic" or an
"inorganic" source at this point?  After all, the chemical 
structure of a given molecule is constant.

//PJML//
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From: Pete Lucas <pjml@not-for-mail.nerc-swindon.ac.uk>
Subject: Re: The use of inorganics
Date: 1998/04/16
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