List of parameters usable in planting goals:

croptype (Minecraft ID of a block ('wheat')):
Type of plant to plant.

plantblockstate (a Minecraft blockstate ('red_flower;type=blue_orchid') (multiple lines possible)):
Blockstate to plant. If not set, defaults to cropType. If more than one set, picks one at random.

seed (item (from itemlist.txt)):
Seed item that gets consumed when planting.

soiltype (Minecraft ID of a block ('wheat')):
Block to set below the crop.
Default value: minecraft:farmland


