Q:

Treat soft wood floor

I recently bought a house and the bedroom has a wooden floor. I have attached a picture of the floor, after it has been sanded. I have sanded the floor level and finished it with a P120 grain.
I am wondering with what kind of varnish I should treat it. The floor is certainly not oak. It's rather soft wood. All the information I can find is about oak or parquet hardwood floors. But that kind of wood is much harder so my guess is I would need something very tough.
Color-wise I think I would like it to be a bit darker than it is now. But whatever product is recommended for this kind of floor will probably come in colors?
Any input is appreciated.

A:

That appears to be a subfloor (softwood, plain edges, face-nailed.) It's a good place to put a finish floor (hardwood, parquet, etc) and not a very good finish floor itself, no matter what you coat it with.
Softwood finish-floors are not unheard of, but that isn't one, IMHO.

