Changing Quality of Terrain Mesh?

Is it possible to change to quality of the terrain? I am Importing a 1024x1024 heightmap and creating the terrain from it. I set up the Terrain LOD like so:

[java] TerrainLodControl control = new TerrainLodControl(terrain, cam);

The terrain is currently to High Poly for My game. How do i change the quality? I tried using the Patchsize, but it doesnt seem to change anything.

Import a 256x256 heightmap? The LOD only decrease the polycount when the camera is far away, it does not create height points.
Alternatively you could scale the terrain so each triangle becomes bigger.