Soil is the term used to describe the entire composition of a given sample of earth. Humus would be just the organic content of the sample, found usually in just the top most layers of soil.
To find the humus content of soil you must weigh a dried sample of soil then heat if at extremely high temperatures to burn off all the organic compounds, then weigh it again, the weight lost is was the humus content.
I remember doing this so many years back in biology :-)
To find the humus content of soil you must weigh a dried sample of soil then heat if at extremely high temperatures to burn off all the organic compounds, then weigh it again, the weight lost is was the humus content.
I remember doing this so many years back in biology :-)