Sorry to say, but those are outdated with the latest version of forestry
You can create one with a manual multifarm, so need an intricate circuit board, and attach rubberised electron tubes to all four slots. Google how to set a multifarm up if you haven't heard of one. They require an input of fertilizer (Apatite stuff, not the IC2 fertiliser from scrap and bonemeal) and water. The energy requirement for them from what heard around the forums is 75MJ per action, not per tick. So, if you've got a large farm it will take more energy than a smaller farm.
Hope this helps