P-values from the analysis of variance of redox conditions and pH for heavy metal fraction distributions.

<p>P-values <0.05 show significant difference within factors and significant interaction between factors for each heavy metal fraction, separately.</p

Correlation between the percentage distribution of iron and manganese bound nickel (Ni_{reducible fraction}) and residual lead (Pb_{residual fraction}) in oxidized and reduced paddy soil samples in Zhangjiagang County.

<p>*, and ** denote the significant correlation at <i>p</i>≤0.05 and 0.01, respectively.</p

The percentage distribution of each metal fraction in oxidized condition in paddy soil samples in Zhangjiagang County.

<p>L means lower pH (<6), M means moderate pH (6–7), H means higher pH (>7). Note: significant interactions within and between factors are presented in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0097327#pone-0097327-t002" target="_blank">Table 2</a>.</p

The percentage distribution of each metal fraction in reduced condition in paddy soil samples in Zhangjiagang County.

<p>L means lower pH (<6), M means moderate pH (6–7), H means higher pH (>7). Note: significant interactions within and between factors are presented in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0097327#pone-0097327-t002" target="_blank">Table 2</a>.</p

Soil chemical properties of rice paddies in Zhangjiagang County, Jiangsu.

<p>Soil chemical properties of rice paddies in Zhangjiagang County, Jiangsu.</p

Correlation between the percentage distribution of cadmium in oxidized and reduced paddy soil samples in Zhangjiagang County.

<p>*, and ** denote the significant correlation at <i>p</i>≤0.05 and 0.01, respectively.</p

Influence of calcium fertilizer treatments on morphological and yield of wine grape.

Influence of calcium fertilizer treatments on morphological and yield of wine grape.</p

Soil properties of vineyard in the eastern foot of Helan mountain.

Soil properties of vineyard in the eastern foot of Helan mountain.</p

Changes in calcium content in different organs of wine grapes with different calcium fertilizer concentrations.

CK means control that unsupplied with calcium fertilizer. Calcium fertilizer treatments from T1 to T5 corresponded to 15, 30, 45, 60, and 75 kg·ha-1 of Ca(NO3)2·4H2O content. Error bars on the volumes means standard deviation.</p

Correlation among indicators of grape morphological and yield.

Correlation among indicators of grape morphological and yield.</p