North American Fruit Explorers mailing list at ibiblio

["Ernest Plutko" <ernestplutko@wiktel.com>]

Trust Mother Earth she knows what plants need.  Manganese excess in
humans causes severe brain damage and Parkinson disease-like tremors.

---- Original Message ----
From: waehner@gmail.com
To: nafex@lists.ibiblio.org
Subject: Re: [NAFEX] Greensand equals Manganese toxicity
Date: Thu, 25 Jun 2009 08:39:33 -0400

>Ernest is right, but we associate "heavy metal" with toxins like
>mercury and
>loud music.
>
>Manganese is a micronutrient, and it easily becomes toxic.  Far
>better to
>manage these through soil pH and lots of organic matter in the soil
>to act
>as a buffer.  Boron, copper and zinc all exist on a fine line between
>toxic
>and deficient.
>
>What is a amazing is that life has built soil that contains the
>proper
>portions of these elements, while their abundance varies widely in
>source
>rock.
>
>
>
>
>
>On Wed, Jun 24, 2009 at 11:45 PM, Ernest Plutko
><ernestplutko@wiktel.com>wrote:
>
>> Manganese is a heavy metal and poisonous.  Be careful adding heavy
>> metals to your soils.
>>
>> ---- Original Message ----
>> From: holycow@frontiernet.net
>> To: nafex@lists.ibiblio.org
>> Subject: Re: [NAFEX] Greensand equals Manganese toxicity
>> Date: Wed, 24 Jun 2009 21:45:35 -0500
>>
>> >Jim,
>> >    I'm thrilled with the idea of something with a lot of
>manganese
>> >in it.  That's one of the deficiencies that shows up here, yellow
>> >stripes in the corn that do NOT respond to adding Mg, but do
>respond
>> >to adding sulfur.  (The sulfur lowers pH enough for Mn to be
>> >available.)  Maybe you have too much Mn already where you are.   
>Don
>> >na
>>
>>
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