POV-Ray : Documentation : Turbulence
  POV-Ray 3.6 Documentation Online View Noise Generators Warps Turbulence

The turbulence pattern modifier is still supported for compatibility issues, but it is better nowadays to use the warp {turbulence} feature, which does not have turbulence's limitation in transformation order (turbulence is always applied first, before any scale, translate or rotate, whatever the order you specify). For a detailed discussion see 'Turbulence versus Turbulence Warp'

The old-style turbulence is handled slightly differently when used with the agate, marble, spiral1, spiral2, and wood textures.

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