Biochar Decelerates Soil Organic Nitrogen Cycling but Stimulates Soil Nitrification in a Temperate Arable Field Trial
Figure 3
Soil C and N pool sizes for control (NPK) and biochar (BC3N) treatments.
Bars represent means ±1 SE (n = 4) from seven measurements between July 2011 and September 2012 for extractable compounds, and from two measurements (September 2011 and 2012) for soil organic C and total soil N. Open bars, control treatment (NPK); grey bars, biochar treatment (BC3N). Units in mg C g−1 dry soil and µg N g−1 dry soil. P values are from two-way mixed ANOVA (see Table 2).