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ASTM WK73005
Equine surfaces located in warm and arid climates often contain organic materials to improve water retention. These organic materials may also serve a secondary purpose by effecting the shear strength of the surface by natural means as opposed to synthetic fibers. For example, the addition of cotton fibers to a turf divot mix may temporarily provide a sufficient shear strength to the divot repair until the roots take hold as the cotton gradually degrades.