that no longer works with the latest forestry. If you are using gregtech there are many things you can do with it. I suppose it depends on your needs. you could make them into biomass, or you could macerate plantballs and centrifuge the dirt to get clay, electrolyze that to get lithium; which you can use to get energy, or to replace energy crystals in several recipes. you could also make it into mulch and mycelium, the mulch can fuel a fermenter, and the mycelium can be centrifuged for clay, and mushrooms, that can be used to get methane for energy.