What items can be farmed fully automatically?

Cacti have always been farmable completely automatically. With pistons in 1.7, sugar cane can now be farmed in a fully automatic fashion as well. Mobs and animals can be farmed as well in giant mob grinders. To my knowledge these are the only items that can be farmed in a fully automatic fashion in vanilla Minecraft.

Cobblestone can be farmed fully automatically using mods, or in a semi-automatic fashion using TNT. Wheat can be farmed semi-automatically on a massive scale, but unfortunately requires replanting and tilling.

What I’d like to know is if there are any contraptions people have contrived to harvest any other item in a fully automatic way without using any mods.

Answer

Aside from the things you mentioned:


Fully Automatic (no need for player’s presence):

As long as you keep the chunk loaded, you can go on an adventure while your farm is producing

  • Anything that uses a smelter (cooked food, experience generators, etc.)
  • Honey Bottles, Honeycomb

Fully Automatic, as long as player is within 128 blocks of farm

  • Melons & Pumpkins can be farmed using BUDs.
  • Mushrooms are easily farmed, since they spread by themselves.
  • Eggs can be farmed
  • Wheat can be fully automatic using a farmer villager
  • Bread with farmer villagers
  • Cactus
  • Coal
  • Iron ingots
  • Gold nuggets
  • Steak, Raw Beef, Leather (if you are lucky enough to find a mushroom island)
  • Cobblestone with Wither or Ghast
  • Cooked Chicken, Raw Chicken, Feathers
  • Redstone, Gunpowder, Glowstone Dust, Sugar, Wooden Sticks with a witch farm
  • Slime Balls
  • Sand & Gravel Duplicators and Flint (actually a bug, but still possible)
  • Carrots and Raw Potatoes with farmer villagers
  • String, Spider Eyes
  • Bones, arrows, bows
  • Rotten flesh
  • Seeds and any kind of 1 block flower
  • Ender pearls
  • Any kind of potion
  • Prismarine Shard
  • Magma cream
  • Ghast tears
  • Kelp
  • Bamboo
  • Sugar Cane
  • Wool (dispenser equipped with shears)
  • Records

AFK farms:

You may need to jam the click button, and you wont be able to play while harvesting

  • Snow (at some time pre 1.15, this was fully automatic. No longer.)
  • Any experience farm
  • Wooden logs (any type)
  • Tree saplings (any type)
  • Fish, Name tags, Nautilus shells, saddles, enchatment books
  • Blaze Rods
  • Any kind of 2 block tall flower
  • Animal breeding farm
  • Dragons Breath
  • Cocoa beans
  • Nether Wart
  • Ice with a BUD to detect the freezing water (not sure if withers can destroy ice)
  • Stone (needs silktouch pickaxe)
  • Any Type of Wooden Planks just craft the output of the log farm
  • Glass and Panes (smelt and craft the output of the sand duplicator)
  • Flint and Steel (craft the outputs of the Iron farm and the gravel duplicator)
  • Mushroom Blocks
  • Grass and Mycelium (although it is not technically infinite, it is practically infinite)
  • Emeralds trading the output of another farm if you get a perfect villager
  • Full diamond toolkit and armor trading emeralds with a blacksmith villager
  • Mob heads except wither skeleton (with a charged creeper farm)

Attribution
Source : Link , Question Author : dlras2 , Answer Author : John

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