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. 2010 Feb 1;7(2):395–412. doi: 10.3390/ijerph7020395

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© 2010 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 3. — Comparison of heavy metal concentrations in soil irrigated with water from local rivers, ground water and the Yellow River and the ANOVA results (p-value). Data represent the mean ± STD.

Soil _{LR – GW} refers to the difference between soil irrigated with water from local rivers and groundwater.

Soil _{LR – YR} refers to the difference between soil irrigated with water from local rivers and the Yellow River.

Soil _{GW – YR} refers to the difference between soil irrigated with water from groundwater and the Yellow River. The same denotation applied to Figure 4.