Figure 5
From: The effects of nitrogen addition on dissolved carbon in boreal forest soils of northeastern China

The relationship between the pH value and (A) DOC and (B) DIC. Red lines show the linear relationships tested; the R2- and P-values indicate the fitted regression coefficients and their significance, respectively. Data collected over the 2010 growing season (May-September) at the Kailaqi farm of Genhe Forestry Bureau, located in the northern Great Xin’an mountain range, northern China.