[permaculture] [SANET-MG] nutrition in a bottle or a bag?

Lawrence F. London, Jr. lfl at intrex.net
Mon Jun 25 16:03:44 EDT 2007


-------- Original Message --------
Subject: Re: [SANET-MG] nutrition in a bottle or a bag?
Date: Mon, 25 Jun 2007 12:51:33 -0400
From: Karl North <northsheep at JUNO.COM>
Reply-To: Sustainable Agriculture Network Discussion Group <SANET-MG at LISTS.IFAS.UFL.EDU>
To: SANET-MG at LISTS.IFAS.UFL.EDU

Tanya Kucak said:

"The most interesting work on soil fertility I've seen is a few short
papers by Roland Bunch based on the work of Ana Primavesi. Basically,
she describes the traditional approach to fertilization as the
Nutrient Quantity Concept -- the notion that specific nutrients need
to be supplied to plants in periodic large doses -- and proposes that
in the tropics, the Nutrient Access Concept is more important. This
is the notion that plants need constant access to tiny quantities of
nutrients, best supplied by nurturing the soil biology and using
sufficient compost and mulch."

I regard the Primavesi work as revolutionary. Because of her work, no
longer can anyone justify feeding plants any other way than through the
biological channels that nature evolved in the soil community. Her worked
demonstrated just how crude and inefficient other methods are in
providing the "constant access to tiny quantities of nutrients", which is
all the nutrient delivery that plants need to maximize growth and health.
To me this means that until someone can demonstrate differently, research
on feeding plants must adhere to that finding, and that rule.  There may
be many ways to enhance that biological delivery system and the health of
its constituents and interactions. In my view that is the research agenda
that Primavesi's work implies.

Karl North
Northland Sheep Dairy, Freetown, New York USA
      www.geocities.com/northsheep/
"Mother Nature never farms without animals" - Albert Howard
"Pueblo que canta no morira" - Cuban saying




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