Its a really cool, citizen science course gathering soil data from around the world. As part of the course, we have started looking at the soil profiles where we live. I will be making a new garden in my side yard this spring and was planning on doing some soil testing there anyway, so I started there with this project. Here are some pictures of the soil profile I found. I will follow up with test results when they arrive.
The top before I dug.
24-inch deep hole. you can see the organic matter at the top and the divide between the A horizon and the B horizon (about 25 cm down)
a difference in color and texture between A horizon and B horizon. In this photo the A horizon soil is the darker part on the right.
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