编辑同志:我们在一些林业书刊和统计资料中,经常看到表示面积的单位时而用亩,时而用公顷的不统一现象。例如,在说造林面积时用亩,说造林密度时用公顷;说林地面积或经营面积时用亩,而说单位蓄积量、林木生长量、林道密度等时又用公顷。这就造成读者理解上混乱,不容易马上得出准确的概念,换算费时。鉴于我国 Editor’s comrades: In some forestry publications and statistics, we often see that the units that represent the area often use acres and sometimes hectares of land are not unified. For example, when we say afforestation area, we say mu for afforestation density and ha for afforestation area or management area, and for unit volume, tree growth volume and forest density. This led to the reader to understand the chaos, not easy to come to accurate concepts, conversion time-consuming. Given my country