Table 1 Soil properties of the pot and the field trials.
From: The role of ruminant urine and faeces in the recycling of nutrients by forages
Soil properties | Soils of the pot trial* | Soils of the fields in the field trial | Analytical method and/or instrument | ||||
|---|---|---|---|---|---|---|---|
Soil of lower carbon content | Soil of high carbon content | Permanent pasture dominantly composed of perennial ryegrass (PP) | White clover and perennial ryegrass mix (WC) | Monoculture of high sugar variety of perennial ryegrass (GM) | |||
Field names | Great Harpenden | Weighbridge Piece | Orchard Dean South | Higher Wyke Moor | Poor Field | – | |
Soil classification | Batcombe Series | Halstow series | Hallsworth series | Hallsworth series | – | ||
(Clayden & Hollies, 1984) | British soil classification (Mückenhausen, 1981) | ||||||
Soil textural class | Clay loam | Silt clay loam | Clay | Clay | Clay | Pipette by Sedimentation | |
Cation exchange capacity (cmol kg−1) | 11.0 ± 0.82 | 15.4 ± 0.34 | 14.0 ± 0.45 | 8.87 ± 0.658 | 10.5 ± 0.84 | Cobalt Hexamine extraction | |
Soil pH | 6.38 ± 0.012 | 6.31 ± 0.016 | 5.89 ± 0.018 | 5.81 ± 0.032 | 5.96 ± 0.065 | 10 g soil extracted using 25 mL Milli-Q water for 30 min | |
Active oxides (mg kg−1) | Al | 1099 ± 8.9 | 1087 ± 6.7 | 1490 ± 114.9 | 1844 ± 75.8 | 1466 ± 69.7 | Extraction using 0.114 M ammonium oxalate and 0.086 M oxalic acid (Schwertmann, 1964; Rayment and Lyons, 2011; Sparks et al., 2020) |
Fe | 4528 ± 56.6 | 8200 ± 48.7 | 9951 ± 516.6 | 7976 ± 238.6 | 6978 ± 386.5 | ||
Mn | 1506 ± 25.9 | 1436 ± 23.0 | 340 ± 43.7 | 233 ± 39.2 | 402 ± 175.4 | ||
P | 360 ± 7.4 | 1003 ± 8.7 | 702 ± 78.5 | 527 ± 26.6 | 411 ± 33.4 | ||
Organic carbon (g kg−1)* | 15.6 ± 0.39 | 35.6 ± 0.24 | 59.5 | 38.7 | 38.8 | Elemental analyser (NA-1500, Carlo-Erba®) | |
Total nitrogen (g kg−1) | 0.02 ± 0.001 | 0.03 ± 0.001 | 6.2 | 4.0 | 4.1 | ||
2 M KCl extractible N (mg-N/kg-DM soil) | 8.7 ± 0.75 | 15.9 ± 2.82 | – | – | – | Photometric analyzer (Aquakem 250, Thermo Scientific®) | |
Total P (g kg−1) | 0.81 ± 0.013 | 1.67 ± 0.058 | 1.42 ± 0.117 | 1.05 ± 0.028 | 1.02 ± 0.052 | Acid digestion using aqua regia and analysed with ICP-MS or ICP-OES | |
Total Fe (g kg−1) | 33.6 ± 0.61 | 27.3 ± 0.89 | 30.8 ± 1.32 | 32.9 ± 0.98 | 36.2 ± 5.55 | ||
Total Mn (g kg−1) | 1.79 ± 0.060 | 1.61 ± 0.058 | 0.47 ± 0.068 | 0.35 ± 0.052 | 0.58 ± 0.258 | ||
Total Cu (mg kg−1) | 17.7 ± 0.22 | 24.1 ± 0.93 | 23.6 ± 1.40 | 21.5 ± 3.19 | 17.9 ± 2.18 | ||
Total Zn (mg kg−1) | 72.1 ± 2.22 | 101 ± 3.4 | 77.8 ± 3.51 | 65.4 ± 1.23 | 80.5 ± 3.95 | ||
Total Se (μg kg−1) | 782 ± 14.0 | 865 ± 26.6 | 841 ± 110.4 | 1014 ± 5.5 | 1312 ± 50.7 | ||
Extractable Se (μg kg−1) | 9.39 ± 0.101 | 9.30 ± 0.102 | 35.0 ± 2.57 | 43.1 ± 1.52 | 50.0 ± 1.11 | ICP-MS analysis following extraction (5 g soil in 25 mL 0.016 M KH2PO4) | |
