[NAFEX] CO2 efflux vs temperature

Joe Hecksel jhecksel at voyager.net
Mon Mar 24 14:09:48 EST 2003

Hi all:

I thought this might be of interest to some of the list members.

A major university used a lot of high priced equipment to determine 
that 87% of the carbon (organic material) burn rate in soil is due to 
soil temperature.  Actual mileage (or kilometerage if metric) will vary:

Temperature F,  Temperature C,  micromole CO2/m/m/s
50                  10              3
60                  16              5.5
70                  21              8.4
80                  27              12

So, cultivating soil might be "burning up" humus through soil 
temperature effects rather than because it is "poking the embers" and 
introducing more oxygen.

Shade that soil!

Joe Hecksel
Personal Webpage http://my.voyager.net/~jhecksel

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