Why would you use dirt? Stone, smooth stone, gotta get the oreberry busheshttp://free-mouse-auto-clicker.en.uptodown.com/
This would be great to use when you have several stacks of dirt
And the gravel from cobble can be automated in 3 ways:I added "Vain Miner" to speed up the process of getting gravel from cobbel
Autonomous activators (1 with stone, 1 with hammers)
Pulverizer
Crusher (I think gives gravel)