A simple stackable fully automatic wheat farm design.

Dimensions (per layer):
Height: 5
Width: 14*
Length: 39**

* Includes 2 blocks which stops water overflowing. Removing these blocks wont impact performance and the width would then be 12.
** Length of the farm can be increased or decreased easily in multiples of 9 blocks by adding sections. One section increases the available farm land by 8x9 blocks. Minimum length is 12 (or 10 without water retention blocks). Currently unsure as to the optimal length.

Efficiency:
Each layer has one villager and produces around 360 wheat per hour.

Downloads:
All files were created in version 1.11.2

The schematic is for 2 layers as the torch tower repeats every 2nd layer.