Table 1.
Chemical properties of the studied HA samples (in part previously reported in Boguta and Sokołowska [33]).
| HA No. | Raw Soil Material | Soil location | N (%) | C (%) | N/C | COOH (cmol·kg−1) | COOH + OH (cmol·kg−1) | Q6 (cmol·kg−1) | E4/E6 | E254/E436 | ∆logK |
|---|---|---|---|---|---|---|---|---|---|---|---|
| HA1 | Haplic Fluvisol (Alluvial soil) | 51°09′ N/22°59 ′E | 5.11 | 54.81 | 0.080 | 321 | 650 | 284 | 5.35 | 5.00 | 0.70 |
| HA2 | Haplic Cambisol (Brown soil) | 50°32′ N/24°01′ E | 3.70 | 51.24 | 0.062 | 411 | 741 | 266 | 5.69 | 5.59 | 0.67 |
| HA3 | Mollic Gleysol (Black Earth) | 50°22′ N/23°39′ E | 4.30 | 53.28 | 0.069 | 424 | 670 | 254 | 7.08 | 8.32 | 0.89 |
| HA4 | Stagnic Luvisol (Grey-brown soil) | 50°38′ N/22°41′ E | 3.35 | 58.97 | 0.049 | 260 | 499 | 261 | 6.17 | 6.48 | 0.75 |
| HA5 | Haplic Chernozem (Chernozem) | 51°23′ N/22°35′ E | 4.69 | 56.1 | 0.072 | 196 | 454 | 278 | 4.8 | 5.28 | 0.65 |