McNab Sport's Osca brush
This is a tractor mounted oscillating brush which is extremely effective on synthetic turf. The Osca de-compacts 2G sand-filled surfaces by bringing the sand to the surface so that any compacted sand is loosened and can then be brushed back into the carpet.
The two oscillating brushes stand the carpet fibres upright and re-distribute the in-fill evenly, so as to minimise compaction on the surface, and improve the playing characteristics.
Brushing is necessary to remove excess material on synthetic surfaces and to keep in-fill mobile to prevent compaction.