Minecraft wiki entry for Cocoa_bean_farming, associated text: A large and rather bulky mechanism may be created in a 7x7x3 with an inner stem of three jungle logs all covered with planted cocoa plants. Four three-block tall towers of pistons on the corners of the logs facing the plants with NOT gates connected to the bottom torches may be used to create a peak efficient farm. The downside is that the harvest will fly away from the center, making it harder to collect.