Collection should include
- gathering samples from several areas on a plot of land
- mixing the samples together
- removing such things as twigs, roots
- air drying
- collecting the desired amount of soil for tests from this sample.
Process/Skill Questions:
- Why should one analyze a soil sample before any endeavor involving the soil?
- Why should multiple soil samples be taken over a given area and mixed together?
- How can soil be tested on-site?