The Wanderer said:

The core is more for a clay type of soil where the spike is for sandy soil.

Bullshit. Golf course greens are based upon sand, and core-aerated
regularly. You know something that Grounds Superintendants don't?

--
Eggs

- If I went 'round, saying I was an emperor, just because some moistened
bink had lobbed a scimitar at me, they'd put me away!