The tech tree lists the only prerequisite for the wood processing research is unlocking agricultural science packs. I've done that, but it still says I'm missing prerequisites.

I will look when I have time, but I think that the prerequisite should be “tree seeding” technology. Do you have any other mods that change research tree?

several. I have no idea which one it could be. Thanks for the tip though!

I think the culprit might be astroponics, since it moves the tree seed recipe to a different node and presumably removes the tree seeding tech