小范围内的高度土壤变异是很常见的，特别是在森林里。
A high degree of soil variability in a small area is common, particularly within forests.
在黄土高原小流域尺度上，地形和土地利用是影响土壤变异的重要因素。
Topography and land use types are key factors which affect soil properties variability on catchment scale in the loess hilly area.
毛竹林土壤养分的结构性变异大于随机变异。
The structure variance of soil nutrient is bigger than the random variance.
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