Table 2. Amount and partitioning of SOC to soil particle size fractions.
| Particle size fractionsa |
Amount of soil organic carbon per g particle size fraction (μg g−1) (contribution to total Corg
in non-fractionated soil (%)) |
||
|---|---|---|---|
|
Soil variantsb |
|||
| NIL | NPK | FYM | |
| Sand and POM (63–2000 μm) | 9.2±1.1 (3) | 14.6±0.6 (5) | 38.1±4.7 (10) |
| Coarse silt (20–63 μm) | 4.0±0.2 (9) | 3.4±0.1 (8) | 11.1±0.5 (18) |
| Fine silt (2–20 μm) | 14.6±0.3 (28) | 15.9±0.9 (30) | 18.8±1.3 (26) |
| Clay (<2 μm) | 43.4±1.6 (60) | 44.5±0.9 (58) | 46.8±3.1 (46) |
Abbreviations: POM, particulate organic matter; SOC, soil organic carbon.
a
Achieved using the ultrasonication wet-sieving centrifugation method according to Amelung et al. (1998), modified by Neumann et al. (2013).
b
For more details, see Table 1 and Materials and methods section.