fert + 2 scrap = 2 fert
And otherwise a cow/pig/chicken/sheep farm with an MFR Sewer should also produce all the fertilizer you could ever want. And in 1.5 you can always make a Skeleton grinder and use the bonemeal in good'ol Dispensers to grow trees as well, so whatever you go for I think it will never be hard to grow trees faster than a Harvester (SC, MFR, Forestry, it doesn't matter) can harvest them.
I have a tree farm with Copper upgrades and a bit of Xycraft Soil (so it's not a solid block of trees) and it produces plenty of saplings and wood (from regular Oak trees) to keep itself running, produce biofuel and charge up a Redstone Energy Cell (which is hooked up to my ore processing as well). I'm sure if I made the entire area Xycraft Soil (1 block deep) and actually use the wood to generate power it would produce way more power then I need, even after the nerfs to Biomass/Biofuel.
 
				
		
 Now you can keep on doing it if you want, not forcing you to stop. But meh, might bug some people more seriously.
 Now you can keep on doing it if you want, not forcing you to stop. But meh, might bug some people more seriously.
		