[Stoves] Info regarding nitrogen content in char

[frank]

Greetings stovers
Just trying to get as much info from the pressed biomass from Richard 
and Jeff for those interested. For the people thinking about using char 
in the soil I thought you might be interested in the nitrogen values 
remaining in the char and compared to the nitrogen at the start. They 
are in percent but if you move the decibel point four places to the 
right you will have in mg/kg (PPM). About 100 ppm available N in the 
soil is good for plants. So 0.16% = 1600 ppm nitrogen. I think it is 
available ammonia or still in protein form but have not looked into 
that. The values were higher than I thought they would be.
These samples have been and still being tested(?)  by Rok so we are 
getting our monies worth from them.  I have pics of the samples to go 
along with the identification for those with high speed Internet and 
interested.

Regards
Frank




Below is the sample id (as much as I was given) in their order.
Below that is the nitrogen and carbon in the dry sample in that order.
Below that is the char N and C values from the dry sample at 400 deg. C  
no air.

#1 Richard Stanley white paper
#2 white with yellow seeds
#3 Black with straw
#4 Dark Brown & straw
#5 light brown
#6 Brown coarse material
#7 Brown with paper
#8 light brown
#9 brown

Jeff Davis
#10 Retted switch grass (small)
#11 Retted switch grass & dirt (large)
#12 Paper (small)
#13 Paper (large)
#14 sawdust & pond scum
#15 charcoal & sawdust
#16 Oil & paper


Dry sample
Richard
#1 0.16% N 24.59%  C
#2 0.07%N(?) 14.52 % C
#3 0.44 %N 38.7 %C
#4 0.65 %N 36.01 %C
#5 0.41 $N 46.77 % C
#6 0.77 %N 35.58 % C
#7 0.42 %N 31.58 %C
#8 0.38 %N 47.52 % C
#9 0.75 % N 38.47 % C
Jeff
#10 0.86 % N 16.62 % C
#11 0.80 % N 17.84 % C
#12 1.21 %N 47.18 % C
#13 0.10 %N 45.75 % C
#14 0.24 %N 49.08 %C
#15 0.22% N 57.34 % C
#16 0.13 % N 73.73 % C

Char
Richard
#1 0.56 %N 29.87 % C
#2 0.42 % N 31.57 % C
#3 0.54 %N 57.06 % C
#4 0.56%N 29.84 %C
#5 0.38 %N 15.81 %C
#6 0.52 %N 20.82 %C
#7 0.90 %N 44.13 %C
#8 0.66 %N 49.01 #C
#9 0.67%N 28.56 %C
Jeff
#10 0.24 %N 3.57 %C
#11 0.32 %N 5.05 %C
#12 0.23 %N 34.45 %C
#13 0.35 %N 43.33 %C
#14 0.39 %N 61.76 %C
#15 0.27 %N 62.24 %C
#16 0.50 %N 51.59 %C
































-- 
Frank Shields
Soil Control Lab
42 Hangar way
Watsonville, CA  95076
(831) 724-5422 tel
(831) 724-3188 fax
frank at compostlab.com
www.compostlab.com