The plantball is the first step in creating a Biofuel Cell. It is made from 8 saplings, wheat, seeds or sugarcane in a square. Note: You cannot mix any of the plants with another plant, the crafting recipe will not work. Doing this with saplings gives you two, but with anything else you only get one. Its only use is to be put in a Compressor to make a Compressed Plantball. Can be used in a fermenter in order to make BioFuel.