i don't see the way to make fertile soil using the blue science pack, can someone help? great mod otherwise.

You unlock the fertile soil recipe with blue science (Soil enrichment). You then create it in a chemical plant with petroleum gas, steam, landfill tiles, and coal.

thanks, that helped. Also how do i reconfigure the mod to get 100% spores from wood?

In mod settings. The chance to get spores from one 'batch' of wood processing ("Spore production") can be configured from 30% (.3) to 100% (1), in 10% increments.