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What is Astroturf ? State its importance in the game of hockey.

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Astroturf is a surface of synthetic fiber made to look like natural grass. 

Importance : Astroturf is water base, due to this the water layer in the hockey pitch (field) has LSR (Low Side Resistance) and shock absorbency properties for excellent players, safety unlike some sand based hockey pitches, the surface will remain soft even at low temperatures thereby, reducing the risk of friction bum.

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