. 2012 Jan 11;7(1):e29413. doi: 10.1371/journal.pone.0029413

Table 1. Concentrations of NH₄ ⁺ and NO₃ ⁻ in soil and gross rates of nitrification and ammonification.

Location/fertiliser treatment	NH₄ ⁺ concentration (µg g⁻¹ dry soil)	NO₃ ⁻ concentration(µg g⁻¹ dry soil)	Nitrification(µg g⁻¹ dry soil d⁻¹)	Ammonification(µg g⁻¹ dry soil d⁻¹)
Upland site, high fertiliser	4.492±0.587	0.003±0.000	0.125±0.02	0.158±0.02
Upland site, low fertiliser	1.765±0.202	0.003±0.025	0.088±0.01	0.246±0.01
Lowland site, high fertiliser	1.325±0.232	0.040±0.026	0.095±0.01	0.197±0.01
Lowland site, low fertiliser	0.810±0.468	0.007±0.003	0.128±0.02	0.203±0.01

Values are means ±1 SE. Soil N concentrations were averaged across t₁ and t₁₄. Nitrification and ammonification rates are calculated between t₁ and t₁₄ and thus represent rates over the 14 days between harvests.

Table 1. Concentrations of NH4 + and NO3 − in soil and gross rates of nitrification and ammonification.

Table 1. Concentrations of NH₄ ⁺ and NO₃ ⁻ in soil and gross rates of nitrification and ammonification.