This includes mobs that do not spawn naturally without the use of spawners, such as cave spiders. Spawner farming involves waiting at an active monster spawner for monsters to spawn. Other uncommon farms use other ways to gain experience, such as fishing or furnaces. Many common experience farms require a difficulty above Peaceful, as they require mobs to spawn. The reason to farm experience is to easily enchant items, or repair tools and armor. Main article: Tutorials/Experience_farming Slime farming Farming slime balls from slimes. Drowned farming Farming tridents, nautilus shells, rotten flesh and copper ingots from drowned. Pillager farming Farming crossbows, emeralds, iron tools‌ and ominous banners from pillagers. Blaze farming Farming blaze rods from blazes. Guardian farming Farming guardians by funneling them to a concentrated area for materials and/or experience. Villager farming Farming villagers requires the player to have enough beds and job site blocks for each villager for them to breed. Hostile mob farming Creating spawn rooms for hostile mobs to be killed for their drops. Bee farming Using flowers to breed bees to store in beehives and bee nests, and make honeycomb and/or honey. Mob farming Animal farming Using wheat, seeds, beetroot, and carrots to breed animals, to be slaughtered for their products or used in egg, milk, or wool farming. Within survival mode, this allows using properly-prepared hostile mobs as part of a farm, e.g., a nametagged zombie in an iron farm. In Java Edition, most passive mobs (the classic farm animals) never despawn (exceptions include untamed wolves, cats, etc).Neither does any boss or miniboss (e.g., elder guardians) Villagers, iron golems and snow golems never despawn.Any mob which has been named with a name tag, or has the NBT tag.Any mob which is riding something else - another mob, a boat, or a minecart.This is inherited if they get converted to another mob, thus Zombie villagers are protected if they were created from a villager which had been traded with. Any mob which has interacted with a player: Lured and/or bred with food by a player, tamed by a player, or created by player breeding.Any mob which is carrying an object (or, for enderman, a block) that it wasn't created with.Any mob that was created as part of a naturally-generated structure.Many mobs are protected from despawning by way of summary: This affects most mob farms, especially those which depend on hostile mobs. In either case, the chunk needs to still be loaded for the despawning process to work.

Mobs will generally despawn if they do not have a player nearby details vary by version, but in general mobs can randomly despawn if no player has been within 32 blocks for at least 30 seconds (sometimes 10 seconds), or if no player is within 128 blocks. This affects most block changes, including farmland and other crop farms. In Bedrock Edition, all loaded chunks in the world are ticked, but in Java Edition, a chunk must also have a player nearby – specifically, some player must be within 128 blocks (horizontal distance only) of the chunk's center. Many farms require their chunks to be ticked. There are other limits to farming regardless of automation: Fully automatic farms do not rely on the player at all and usually use mobs or more complicated mechanisms. Semi-automatic farms use mechanisms to automatically harvest the farm, but they are manually activated by the player. Manual farms rely mostly or solely on the player to harvest and restart the farm. Farms can be classified as manual, semi-automatic, and fully automatic.

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