Soil sampler

A method of using a soil sampler to collect a soil sample, the method comprising:

• aligning a plunger relative to a base in one of a first position and a second position, wherein an extension of the plunger extends into the base along a collection axis to define a collection cavity within the base, the extension at least partially disposed within the base, wherein the first position is associated with a first volume of the collection cavity and the second position is associated with a second volume of the collection cavity, the second volume different from the first volume;
• pressing the base into soil to cause a sample of soil to enter into the collection cavity;
• pulling the plunger in a first axial direction along the collection axis and axially away from the base;
• rotating the plunger relative to the base to place the plunger in an ejection position relative to the base, the ejection position different from the first position and the second position;
• and
• driving the plunger in a second axial direction opposite the first axial direction and into the base with the plunger disposed in the ejection position, the extension driving the sample of soil out of the collection cavity.