Redbeard...
That sure looks like it would open up a hole in just about any soil type.
How do you deliver the seed into the hole ?
I have a rather simple planter that is made up of a sharp shooter shovel with a pvc pipe duck taped on for seed delivery.
I have planted a bunch of seed with it and it works well even thru fairly thick leaf cover.
I basically just shove it into the soil and twist it a bit and it opens up a nice hole (takes some practice to get the depth about right every time)... and then I drop a couple seeds down the pipe.
Here is what it looks like. Easy to make and simple to use.
TNhunter