[Terrapreta] Catalyst: Carbon Bigfoot

[Chuck Yokota]

Hi Sean, 

 

Ah, we have a little confusion with nomenclature.  The UN Food and
Agriculture Organization defines "agricultural land" to include both
arable land and pasture land.  By this definition there is 5 billion
hectares of agricultural land.  Arable land is 1.5 billion hectares, so
you are correct in thinking that arable land is 10% of total land area.
I got this information at
http://www.fao.org/es/ess/os/envi_indi/part_15.asp 

 

Chuck

 

 

________________________________

From: Sean K. Barry [mailto:sean.barry at juno.com] 
Sent: Tuesday, December 11, 2007 12:27 PM
To: Chuck Yokota
Cc: terrapreta
Subject: Re: [Terrapreta] Catalyst: Carbon Bigfoot

 

Hi Chuck,

 

Good points.  You quibble exactly appropriately with another silly
American.  Thanks for the correction.  It surprises me somewhat, too,
that 5/14.9 = ~1/3 (33%) of all land is viewed as arable.  I would have
thought it was much less than that, more like 10%.  That's is why I was
thinking 5/51.  Now you can see why I would ask people to mention
corrections to any mistakes I make in statements here.  Because I do
make some. 

 

Thanks and Regards,

 

Sean K. Barry
Principal Engineer/Owner
Troposphere Energy, LLC
11170 142nd St. N.
Stillwater, Minnesota 55082-4797
(651)-285-0904 (Work/Cell)
(651)-351-0711 (Home/Fax)

sean.barry at juno.com

	----- Original Message ----- 

	From: Chuck Yokota <mailto:cyokota at innovativeenergyinc.com>  

	To: Terrapreta <mailto:terrapreta at bioenergylists.org>  

	Sent: Tuesday, December 11, 2007 11:30 AM

	Subject: Re: [Terrapreta] Catalyst: Carbon Bigfoot

	 

	Hi Sean,

	 

	We agree on the math about the amounts of charcoal to
sequestrate carbon, except that I (silly American) slipped into using
acres when I meant hectares.  My focus was that the farmer would see
good productivity gains from the first 5 or 10 tons per hectare, but not
enough additional productivity gains from putting on more charcoal to
justify the cost.  Additional sequestration would depend on some form of
carbon credits.

	 

	One small quibble:  The total surface of the earth, land and
ocean, is 510 million square kilometers.  The land area is 149 million
square kilometers (14.9 billion hectares).

	 

	Chuck

	 

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