天蓝 地绿 水清 人和——绵阳创建国家园林城市纪实
Published in 国土绿化 • Jan 1, 2004
Authors:
黄森木
Abstract
A mathematical model of the Great Lakes total phosphorus budgets indicates that a 1 milligram per liter effluent restriction for point sources would result in significant improvement in the trophic status of most of the system. However, because large areas of their drainage basins are devoted to agr...
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