Storage time | ST > 3 years | 2 ≤ ST < 3 years | ST < 2 years |
parameters | “old” DFS | “intermediate” DFS | “recent” DFS |
pH (H2O) | 4.95 ± 0.31 | 5.01 ± 0.28 | 5.16 ± 0.05 |
CE (mS/cm) | 2.30 ± 0.51 | 3.51 ± 0.24 | 2.64 ± 0.52 |
CO (%) | 13.64 ± 3.75 | 12.83 ± 3.96 | 17.79 ± 0.91 |
MO (%) | 23.52 ± 6.46 | 22.12 ± 6.83 | 30.66 ± 1.58 |
N-t (%) | 1.21 ± 0.36 | 1.08 ± 0.37 | 1.46 ± 0.11 |
C/N | 11.34 ± 0.49 | 12.06 ± 1.11 | 12.17 ± 0.60 |
P-t (mg/kg) | 12,603.90 ± 1847.90 | 12,922.95 ± 1155.06 | 13,476.13 ± 2882.28 |
K-t (mg/Kg) | 556.22 ± 71.68 | 576.13 ± 189.23 | 704.72 ± 113.15 |
Na (mg/Kg) | 152.31 ± 44.99 | 169.69 ± 61.43 | 148.90 ± 27.76 |
Ca (mg/Kg) | 3680.58 ± 665.33 | 3931.76 ± 741.89 | 4702.55 ± 502.39 |
Mg (mg/kg) | 2012.57 ± 597.70 | 1425.57 ± 87.61 | 1503.04 ± 400.78 |