Doser assemblies, apparatuses including a doser assembly, and/or methods of making the same

A method of manufacturing a doser assembly, the method comprising:

• providing a hopper assembly configured to receive plant material,
• an interior surface of the hopper assembly defining a hopper opening that extends through the hopper assembly;
• arranging a shaft to extend across a portion of the hopper opening;
• positioning a roller in a portion of the hopper opening of the hopper assembly, the roller extending in a direction between a first part of the interior surface of the hopper assembly and a second part of the interior surface of the hopper assembly, the positioning the roller including connecting the roller to the shaft and configuring the roller to rotate with a rotation of the shaft;
• connecting a vertical adjuster connected to the shaft, the vertical adjuster being configured to adjust a position of the shaft;
• connecting a first conduit line to a first conduit opening in the hopper assembly, the first conduit line being configured to provide vacuum, gases, or both vacuum and gases into the hopper assembly through the first conduit opening in the hopper assembly;
• and
• optionally connecting a second conduit line to a second conduit opening in the hopper assembly, the second conduit line being configured to provide vacuum, gases, or both vacuum and gases into the hopper assembly through the second conduit opening in the hopper assembly.