Minecraft wiki entry for Superflat_survival, associated text: Every villager profession has its own job site block. The first profession you need is a farmer, so place a composter. Farmers buy crops that can turn your wheat, potatoes, carrots, beetroot, melon, and pumpkin (from crop farms) into emeralds. Break and replace the workstation to get the trade you want (preferably wheat, carrot, or potato. Carrot or potato is better as you can fortune the crop and get more.) To make this process easier, remove all workstation blocks in your house so the villager can't claim it. Master-level farmers also can sell golden carrots, which can be used to breed horses and donkeys. Use gold for golden apples only.