How would you tag the name of a farm, eg Big Tree Farm. Would you use ‘place=locality’ and then ‘name=Big Tree Farm’?
cheers, 
I’d use “name”. “locality” is for unpopulated places which however have a name.
The name tag is an additional tag. The basic tag describes the object. The tag to use depends if there’s a node, an area describing the farmyard or an area describing the farmland. Have a look at place=farm for a description of the differences.
landuse=farm, name=*