Table 1.
Properties of collected soil samples.
| ID | Soil | Location | Horizon | pH | TOC, % | Humic Acid Content, g L−1 | Texture | Mineralogy of Clay Fraction |
|---|---|---|---|---|---|---|---|---|
| Cher1 | Orthic Dark Brown Chernozem | South-central region, Alberta, Canada | Ah * | 7.9 | 3.9 | 15 | Clay loam | Mte-Kte |
| Cher2 | Orthic Black Chernozem | Central region, Leduc, Alberta, Canada | Ah | 7.3 | 4 | 19 | Silt loam | Mte-Kte |
| MBr | Gleyed Dystric Brunisol | Mountain region, Old Entrance, Alberta, Canada | LF ¥ | 4.8 | 38 | 1.5 | N/A (org.hor.) | N/A (org.hor.) |
| Bf # | 6.3 | 1.0 | 0.5 | Loam | Mica-illite | |||
| NBr | Gleyed Eluviated Melanic Brunisol | Northern region, Hangingstone river, Alberta, Canada | LFH € | 4.0 | 35 | 3.8 | N/A (org.hor.) | N/A (org.hor.) |
| Ae £ | 5.3 | 1.3 | 0.5 | Silt loam | Mica-illite | |||
| NLuv | Podzolic Grey Luvisol | Northern region, Hangingstone river, Alberta, Canada | LFH € | 3.7 | 40 | 4.2 | N/A (org.hor.) | N/A (org.hor.) |
| Ae | 5.5 | 1.1 | 0.2 | Silt loam | Mica-illite | |||
| Lep | Leptosol | Nordfjella region, Norway | A | 4.8 | 21 | 0.8 | Silt sand | Vermiculate, quartz |
* Ah—Surface mineral horizon enriched with organic matter; ¥ LF—Surface organic horizon consisting of relatively fresh plant litter (L), fermented litter (F); # Bf—Mineral horizon 10–50 cm below the surface enriched with iron or aluminum; € LFH—Surface organic horizon consisting of relatively fresh litter (L), fermented litter (F) and well-decomposed litter, humus (H); £ Ae—Surface or near surface mineral horizon where clay and organic material has leached out.