Does putting a land onto the battlefield with Rampant Growth count as playing a land for the turn?

Playing a land is a special action defined in CR 305.1: a player may play a land from their hand during their main phase, when the stack is empty, and only once per turn (unless an effect grants additional land plays). This special action is distinct from any other way a land might enter the battlefield.

Rampant Growth instructs you to search your library for a basic land card and put it onto the battlefield tapped. This is a spell effect placing a permanent directly onto the battlefield — it is not the special action of 'playing a land' as defined in CR 305.1 and CR 116.2a. Therefore, it does not count against your one-land-per-turn limit.

CR 305.2 reinforces this: the restriction on playing lands applies only to lands played as a special action from a player's hand. Lands that enter the battlefield via spell or ability effects bypass this restriction entirely.

Concrete example: On your turn, you cast Rampant Growth and put a Forest onto the battlefield tapped. You may still play a land from your hand this turn normally, because Rampant Growth's effect did not consume your land play for the turn.

This also means effects that say 'you may play an additional land' do not interact with or enhance Rampant Growth — that card doesn't play a land at all. The two systems are completely independent.