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  1. ... from the climax ideal for a particular area.Despite this overall abandonment of climax theory, during the 1990s use of climax concepts again became...

    分類:科學 > 其他:科學 2006年06月05日

  2. ... of soil productivity, which is causing extensive Land abandonment , is a widespread byproduct of current practices in agriculture and animal husbandry...

    分類:科學 > 其他:科學 2005年08月10日