Soil Application of Tannery Land Plaster: Effects on Nitrogen Mineralization and Soil Biochemical Properties

Figure 1

Concentrations of K₂SO₄ extractable NH₄ ⁺-N in soil M (a) and soil P (b) and K₂SO₄ extractable NO₃ ⁻-N in soil M (c) and soil P (d) at different sampling times. C: controls; 220: TLP addition rate at 220 kg N ha⁻¹; 440: TLP addition rate at 440 kg N ha⁻¹; bars represent standard deviation (𝑛=3).

(a)

(b)

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(d)