MOST EFFICIENT Cactus Farm Design (How to Make an Automatic Cactus Farm) [Minecraft] - YouTube
Cactus Farm, creation #13262
Most Efficient Cactus Farm Designs - YouTube
Tutorial] Cheap Full Auto Xp Farm With Cactus And Bamboo! - Minecraft Tutorial - video Dailymotion
My simple auto cactus farm. What happens is the cactus grows 3 high and triggers the observer, which goes into a double piston extender that pushes the second block into a hopper,
Minecraft: How to build a Fully Automatic Sugarcane Farm, Tutorial for 1.8, simple, compact - video Dailymotion