The Terra Farm script is a revolution, you can dig the ground with any bucket just like with the basic landscape tool of the game.
Tired of using the landscaping tool to sculpt your yard? Not satisfied with using field types of backfill to supply your mining team? No worries, with TerraFarm you can shape your own land using the equipment of your choice.
Mod now also supports several fill types which you can change in the settings GUI. By default STONE and DIRT (will be added if they do not already exist). You can also choose from additional fill types if they are added by the 3rd. mod / party card: