Schedule F indicates - being used for business.... 

That is then business property so 39 years is correct.

IF it's being rented out, but not being used on the FARM it goes on Sch E and is residential rental so 27.5 years would be used.

If I had $ 10 for every time I've seen OIH depreciation using 27.5 instead of 39 years  (yeah, it's a house, but it's used for *business*.... I'd buy a used Delorean.