If you didn’t know this was an original video from Wildlands School, the first thirty seconds of their logo, in about thirty different forms, should be enough to give you a hint. After that, however, they get to work, weighing empty crucibles on a scientific digital scale, filling the crucibles with damp soil and weighing them again, then putting them in a drying oven. At which time, they are weighed again to determine moisture content. The crucibles are then heated to 400 degrees C, burning off the organic material. Reweighing then gives the percentage of organic material in the soil sample. Something doesn’t strike me as quite right about that, but I guess it’s close enough to demonstrate the principle.

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