OR the wonderfully confusing verbal fuzzy spewage as follows.
Well...
First get some cows.
Put them in a pen.
Make a sewer and put it in center of pen. (3x3 size pen if ya like, 1 sewer has a 3x3 area for collecting ... stuff) no power needed.
Run some water proof pipe from the sewer to a composter.
The composter makes fertilizer but requires sewage and mj.
Use item pipe from composter to a block called a fertilizer.
Make a 3x3 square of dirt. Put the fertilizer just back from the dirt facing the center of the 3x3 of dirt. Run mj to the fertilizer.
Now need a harvester. Put that just off the dirt aimed at the center of the 3x3 of dirt. It needs mj and you'll want an item pipe from it to collect your saplings, wood, and 'apple, rubber, etc...' whatever extra that type of tree produces. I like deep storage from mfr to store the stuff you get.
Now almost ready. Make a planter. Put it under the 3x3 of dirt at the center. It needs mj and fill it with saplings.
Play around with your item loops and such. Using diamond pipes you can tell the item stream from the harvester to send some of the saplings back to the planter to automate it.
Providing power. If you wanna make it totally self sufficient you can take the wood produced and use a sawmill from Thermal Expansion to get 6 planks and some sawdust. Do what ya want with the sawdust, but I usually run the planks over to some cheap stirling engines or hobby engines. There's your power and basically you now have a tree farm that'll produce tons of wood, saplings, apples(rubber, etc...) for you.
As of 1.5.2 though the thermal expansion has a bug that makes it only give you 4 planks. So may as well have a furnace and burn wood to get charcoal at that point until it's fixed. But for 1.4.7 you're golden.
You can make 'upgrades' for cheap for the MFR stuff that can make your farm bigger. Last one I did was 9x9 and used three tin upgrades in the fertilizer, planter, and the harvester.
If you wanna use the sludge the harvester collects you can even make a sludge boiler and get things like sand, dirt, heat sand, soul sand, tainted dirt, clay, and peat. But ... it's really meh and not necessary. I did it on mine to get some soul sand but shortly just went to the nether and got loads.
So, it's not even needed and probably not all that worth it to do. The harvester doesn't care if it's full on sludge, it doesn't stop working and doesn't slow down.
There are also videos, but that's the basic setup and the videos will show ya where to place stuff and such.
That all being said...
I use a peat bog and a custom turtle program to collect it all for me. One diamond, One redstone, and the rest is just dirt cheap stuff and brainz.
Peat engines only need copper ... and I had spawned in an area so ugly rich with copper I was like, "Time for peat".