看管“美国的前院”是草坪管理者最伤脑筋的事。这个“前院”就是华盛顿的国家广场,它从美国国会大厦延伸到华盛顿纪念碑。广场上每年大约有1400万游客和举行1400多次集会。 除了要经受强烈的践踏外,广场偏偏处在美国较严酷的气候带,即通常所说的过渡带,连接南部温 Watching “the front yard of the United States” is the most troubling thing for turf managers. The “front yard” is Washington’s National Mall, which extends from the U.S. Capitol to the Washington Monument. There are about 14 million tourists and more than 1,400 rallies every year in the square. In addition to being subjected to intense trampling, the square is in the harshest climates of the United States, the so-called transition zone, connecting the southern temperature