Crop Rotation can also get you
Gaea's Cradle, etc. I think of it more as tutor than ramp (same as
Expedition Map), though obviously what you're normally tutoring for is a ramp piece.
Honestly I don't tend to use
Cultivate/
Kodama's Reach unless it's some kind of "lands matter" deck. Since you're in green, you already have four straight mana dorks and the one-mana land enchantments. I also kind of prefer
Farseek,
Three Visits and
Nature's Lore since being able to cast them earlier is a lot better - but then two-mana mana rocks are basically just better (albeit slightly more fragile). The benefit of
Cultivate is that it's also a form of card advantage, but so is
Beanstalk Giant and that has the land enter tapped (more like a three-mana mana rock, but that also gives you a giant later).
There is also
Explore... not being an instant a la
Growth Spiral though I think doesn't make up for the unreliability/fiddliness as compared with e.g.
Farseek, though the cantripping is always nice.
Oh,
Fertilid! A bit slow and expensive on its own but synergy with counters stuff (or
Evolution Sage), etc.