pH Overall, aside from N420, soil pH showed a decreasing trend with profile depth.
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Effects of Biochar Applied in Either Rice or Wheat Seasons on the Production and Quality of Wheat and Nutrient Status in Paddy Profiles.
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Soil NO 3 − -N contents showed a trend of first decreasing, then increasing, and again decreasing trend along with the profile depth.
Total N contents gradually decreased at the 0–5 cm and 5–10 cm of the soil profile, followed by an increasing trend at 10–30 cm and finally a gradual decrease ( Figure 2 c).