using a soil knife to collect samples
![using a soil knife](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/197%20field%20knife.jpg?itok=5O2Mpo9P)
Detailed Description
Scharer uses a soil knife to collect samples of sand and gravel for later examination.
Sources/Usage
Public Domain.
Scharer uses a soil knife to collect samples of sand and gravel for later examination.
Public Domain.