Minecraft wiki entry for List_of_sediments, associated text: Dirt Path – grass, podzol, or coarse dirt that a path has been worn into
Grass Block – dirt with grass growing in it; can support most plants
Farmland – hand-tilled dirt ready for planting crops in
Mycelium – clumped dirt and mushroom hyphae; only found on mushroom islands
Podzol – the soil of old growth taigas and bamboo jungles; can support mushrooms and some plants