Applied and Environmental Soil Science

Research Article

Nitrogen and Phosphorus Changes in Soil and Soil Water after Cultivation

Table 2

Mean values of phosphorus and nitrogen concentration in soil water after fertiliser treatments were applied. Values in brackets represent significance at 5% level. Values before the comma compare ploughed versus unploughed within a fertiliser treatment, while values after the comma compare fertiliser treatments with identical sod preparation. Within a row, items with the same letter are not significantly different.
Concentration (mg/L)
TreatmentsDRPTDPTPTDNTNNH3NOxDUPPPPNDINDON
10 kg/ha PUnploughed0.55 (a, a)1.2 (a, a)1.6 (a, a)13.2 (a, a)14.6 (a, a)0.6 (a, a)1.5 (a, a)0.52 (a, a)0.24 (a, a)1.26 (a, a)2.5 (a, a)10.2 (a, a)
Ploughed0.13 (b, a)0.3 (b, a)0.4 (b, a)11.3 (a, a)12.0 (a, a)0.4 (a, a)1.2 (a, a)0.16 (b, a)0.1 (b, a)0.5 (b, a)1.8 (b, a)9.2 (a, a)
35 kg/ha PUnploughed0.62 (a, a)1.3 (a, a)1.7 (a, a)13.2 (a, a)14.7 (a, a)0.5 (a, a)1.7 (a, a)0.53 (a, a)0.24 (a, a)1.19 (a, a)2.5 (a, a)9.9 (a, a)
Ploughed0.21 (b, b)0.4 (b, a)0.5 (b, a)9.8 (b, a)10.4 (b, a)0.4 (a, a)1.3 (a, a)0.15 (b, a)0.09 (b, a)0.51 (b, a)1.9 (b, a)7.7 (b, a)
100 kg/ha PUnploughed1.5 (a, b)2.3 (a, b)2.9 (a, b)13.0 (a, a)14.6 (a, a)0.5 (a, a)1.5 (a, a)0.39 (a, a)0.26 (a, a)1.14 (a, a)2.2 (a, a)10.0 (a, a)
Ploughed0.55 (b, c)1.0 (b, b)1.2 (b, b)9.0 (b, a)9.7 (b, a)0.4 (a, a)1.2 (a, a)0.25 (b, a)0.11 (b, a)0.56 (b, a)1.8 (a, a)7.4 (a, a)