uw extension form for soil analysis
Form and instructions for testing of soil samples by UW-Madison Extension
https://uwlab.webhosting.cals.wisc.edu/wp-content/uploads/sites/17/2018/03/lawngarden-3-18.pdf
Directions for collecting samples
https://cdn.shopify.com/s/files/1/0145/8808/4272/files/A2166.pdf