纯林是指由一种树种组成或次要树种不足一成的森林。人工林有较规则的株行距，林木分布比较均匀整齐，树种较单纯，多为单纯林。
Soil moisture of the mixed forests was lower than of the pure plantation forests in spatial variability on both vertical and horizontal spatial dimensions, but more uniform in spatial distribution.
梾木×香椿、青桐×桤木混交林土壤水分在水平方向和垂直方向上空间变异程度比枫香纯林、香椿纯林低混交林土壤水分的分布更均匀。
参考来源 - 退化石灰岩红壤区四种人工林旱季土壤水分的空间变异However, long-term management of monoculture plantations was found to cause soil degradation and productivity decline.
然而,由于长期采取单一树种的纯林经营模式,致使立地衰退与森林生产力的下降。
参考来源 - 马尾松林下套种阔叶树对森林凋落物及土壤的影响·2,447,543篇论文数据，部分数据来源于NoteExpress
近年来，浙江省局部地区国外松纯林受芽流脂病危害较为严重。
In recent years, pure forests of exotic pines were seriously harmed by resinosis in some areas of Zhejiang.
林地土壤因子调查的结果是混交林内土壤的通气性、透水性及总孔隙度均好于纯林。
Investigation of the soil factors showed that the aeration and water perviousness of mixed forest were better than that of pure forest.
结果表明：空间统计学半方差方法可以作为郁闭度较高纯林林分冠幅估计的一种有效方法。
It is concluded that the semivariogram method of spatial statistics may be as an effective means of estimating the crown of pure forest stand with relative high crown closure.
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