Here is the website that I got the "What is Soil Made Of" information from. There is a bit more information there.
For the annotated pie graph I would like you to use the percentages listed from that website.
You should annotate your pie chart with information about the range of percentages and a little bit (10-30 words) of information about the type of material. For example: Minerals make up approximately 45-49% of soil, they are composed of primary and secondary minerals that are weathered from the parent material.
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