SCI刊物还分为影响因子高区（大于1.105)、中区(在1.105和0.422之间）和低区（小于0.422)3类。

2006年土壤学一些处在影响因子高区的期刊有：

soil biology & biochemistry 2.623

european journal of soil science 2.0

applied soil ecology 1.929

soil science society of america journal 1.869

soil & tillage research 1.619

plant and soil 1.495

biology and fertility of soils 1.405

water air and soil pollution 1.205


处于高区的部分的杂志IF下降了:

soil use and management 0.74 (04年是1.464 )

很有希望进入高区的杂志:
J PLANT NUTR SOIL SC 0.989
SOIL SCI 0.956

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