First is a core of rock, then clay and lastly soil, topped with grass seed that will withstand being walked on.

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Grassed areas along the road were reinstated using aqua seeding, a process by which grass seed is sprayed using high-pressure pumps.

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To establish a meadow, it usually takes 10 to 20 pounds of wildflower and grass seed for each acre, says Howard Bright, president of Ion Exchange, a specialty nursery in Harpers Ferry, Iowa.

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In the other men's grass-court tournament being played, second seed Novak Djokovic is through to the final in Halle after a 7-6 6-4 victory over Belgian Olivier Rochus.

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The tournament's top seed, Australian Lleyton Hewitt who won on grass at Queens Club in London a week ago, withdrew before his opening game to nurse an ankle injury.

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