Table 3. Characteristics of the three study sites.
HF upslope | HF downslope | UTM | |
---|---|---|---|
Soil class | Dystric Brunisol | Orthic Humic Gleysol | Brown Luvisol |
Soil texture (A horizon) | sandy-loam | sandy-loam | sandy clay loam |
LFH/O depth (cm) | 5–10 | 15 | <2 |
pH (H2O) | 4.9 ± 0.2 | 5.2 ± 0.2 | 6.8 ± 0.1 |
Bulk density (g cm−3) | 0.79 ± 0.02 | 0.81 ± 0.03 | 1.03 ± 0.04a |
LOI (%) | 31.5 ± 3.4 | 87.6 ± 1.8 | 12.3 ± 1.0 |
WHC (g water g−1 dry soil) | 2.3 ± 0.5 | 2.1 ± 1.2 | 0.87 ± 0.1 |
Field moisture content (g water g−1 dry soil) | 2.1 ± 0.8 | 8.8 ± 2.1 | 0.48 ± 0.1 |
MB-C (mg C g−1 dry soil) | 1.2 ± 0.06 | 1.5 ± 0.11 | 0.08 ± 0.04a |
Extractable DOC (mg C g−1 dry soil) | 1.3 ± 0.07 | 2.3 ± 0.13 | 0.09 ± 0.03a |
Total C (%) | 45.1 ± 0.4 | 19.3 ± 3.4 | 6.8 ± 1.2 |
Total N (%) | 2.8 ± 0.2 | 1.7 ± 0.2 | 0.5 ± 0.1 |
Extractable NO3− + NO2− (μg N g−1 soil) | 21.4 ± 2.5b | 26.1 ± 6.3b | 33.6 ± 2.5a,c |
Extractable NH4+ (μg N g−1 soil) | 180.8 ± 12.4b | 278.8 ± 20.4b | 7.55 ± 0.8a,c |
Extractable PO43− (μg P g−1 soil) | 8.2 ± 2.3b | 15.6 ± 3.8b | 78.6 ± 23.6a,d |
Values represent means ± SEM for the top 5 cm of the soil.
aData are from Pugliese et al.71
bK2SO4 extraction.
cKCl extraction.
dBray-1 extraction.