which is the best type of sprinkler?

[shiva]

If you don't want the leaves to get wet you can use a soaker hose that has holes in it and waters more toward the roots of the plants.

It might be a drip irrigation not sprinkler because a sprinkler will always thros water to certain distance. I understand your point without watering on leaves one can use soaker hose, but drip also suitable or a wate spike in this way.