How to increase number of inodes in a BSD file system?

[Robert Claeson]

In systems that uses the AT&T 0.5K, 1K and 2K file systems, one
can set the number of inodes to allocate in the file system directly
as an argument to mkfs. But how do I perform the same task in a system
that uses the BSD file system? Mkfs for the BSD file system uses
complelely different arguments. The last argument is somewhat related
to the number of inodes to allocate, but when I try to set it, it
doesn't seem to have any direct effect.