#organic_fertilizer__organicfertilizer__organic  a fertilizer that is derived from animal or vegetable matter
  supertype:  #fertilizer__plant_food__plantfood  any substance such as manure or a mixture of nitrates used to make soil more fertile
  subtype:  #bonemeal  fertilizer made of ground bones
  subtype:  #neem_cake  residue after oil is pressed from neem seeds
  subtype:  #manure  any animal or plant material used to fertilize land especially animal excreta usually with litter material
     subtype:  #chicken_manure__chickenmanure  chicken excreta used as fertilizer
     subtype:  #cow_manure__cowmanure  cow excreta used as fertilizer
     subtype:  #green_manure__greenmanure  a growing crop that is plowed under to enrich soil
     subtype:  #horse_manure__horsemanure  horse excreta used as fertilizer
     subtype:  #night_soil__nightsoil  human excreta used as fertilizer
  subtype:  #fish_meal  ground dried fish used as fertilizer and as feed for domestic livestock
  subtype:  #guano  the excrement of sea birds; used as fertilizer

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