This page shows the mechanics of the MultiFarm structures, and how to build them.
The Farm Block is the main structural block of the Farm, and because the Farm is multi-block structure, you will need several of them, depending on how big you want it. The third layer of the farm must entirely consist of these. All other blocks in the structure are interchangeable with any of the other component blocks though.
The chosen material will dictate what the Farm looks like. Different materials can be combined for decorative purposes.
To build the Farm, you will first need to set up its layout. You can choose from the following:
You will also need to lay out the area for the farmland, using any of the following blocks:
The farmland can be laid out at any level (comparative to the Farm's structure), this means that you can place the farmland directly below the Farm Structure, aligned with any level of its 4-tall structure, etc.
You cannot lay the farmland directly on top of the Farm's structure, though.
The table above is a side representation of both valid and invalid setups, regarding where you can place your farmland.
Although they represent 3×3 setups, the concept is the same for the remaining sizes.
Some of the Farm Blocks can be replaced with special ones that add extra functionality to the Farm.
To add one of the blocks described below, replace one of the outer Farm Blocks (except the ones on the 3rd layer) with the one you want.
Some farms require water for hydration purposes. Although you can do it manually by supplying it through liquid containers (such as cans), you can also automate the process by using Farm Valves.
By connecting a Buildcraft Waterproof Pipe into the Farm Valve and supplying Water, you can automatically fill the Farm's Water Tank.
To power your Farm and have it automatically harvest crops, you will need at least one Farm Gearbox.
Farm operations can be hasted with additional Gearboxes.
You can supply and extract items from the Farm by using Farm Hatches that are connected to Pipe systems.
Fertilizer is added from the west side, soil from the north, and seeds/saplings from the top. Items are extracted from the bottom.
The Farm Hatch is clever enough to know which item goes where. If an item isn't appropriate for the farm's configuration, the Hatch will simply reject it.
Any item that is harvested by the MultiFarm is automatically ejected by the Farm Hatches into inventories or Buildcraft Transport Pipes directly below them. Pipes can be used to extract from other sides.
You can control which fields your farm works on by applying redstone signals to control blocks. You can either shut down the whole farm by applying a redstone signal from top or below or you can disable a specific side by applying a redstone signal on the matching side of the control block.1)