How to sample what you compost.

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We often forget that composting is an oxidation process exactly like burning. True higher temps destroy some value but then making a fire is also educational, as the compounds in the fire will show their true colors. Here is a paper bag for containing charcoal aflame upon a stump. Can anyone tell me the reason the flame is burning that particular color?
IMG_20190416_193130.jpg


And...is is good for soil?
 

NigelJ

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Assuming the picture is a fair representation of the flame. Copper compounds give a blue/green colour. Possibly from staples in the bag.
 

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