Blender Cycles shows object in viewport render but not in final render

Question

I'm following a really great forest tutorial.

This is a picture of my render in the viewport. In the bottom left and right corners you can make out a little dirt texture that I've added onto the ground.

Here is the image in the final render.

In the bottom left and right corners you can see a transparency texture which means that Cycles is not rendering my ground object. The object is enabled for rendering in the outliner.

It is also checked for "show in renders" in the object properties panel

As always, help is greatly appreciated and thank you for reading my post.

Here is the blend file.

Answer 1

Your DirtGround object does not have the Show Emitter checkbox checked under the particle system render settings, only under the viewport settings:

If you check that checkbox, your ground object should appear in renders as well.