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Table 2 Soil characteristics in the three RadiMax units

From: Testing deep placement of an 15N tracer as a method for in situ deep root phenotyping of wheat, barley and ryegrass

UnitSoil depth (m)Clay (< 2 ɥm) (%)Silt (2–50 ɥm) (%)Fine sand (50–500 ɥm) (%)Coarse sand (500–2000 ɥm) (%)Organic carbon (%)Soil bulk density (g cm−3)PHP (mg kg−1)K (mg kg−1)Mg (mg kg−1)
10–0.40.12 ± 0.000.14 ± 0.030.45 ± 0.020.29 ± 0.010.015 ± 0.0001.58 ± 0.047.10 ± 0.203.50 ± 0.0010.50 ± 1.005.05 ± 0.30
0.5–1.00.14 ± 0.020.14 ± 0.040.45 ± 0.050.26 ± 0.010.006 ± 0.0041.76 ± 0.077.40 ± 0.200.90 ± 0.403.90 ± 0.003.15 ± 0.30
20–0.40.12 ± 0.010.13 ± 0.030.44 ± 0.010.29 ± 0.010.017 ± 0.0041.59 ± 0.057.00 ± 0.404.00 ± 1.0012.00 ± 4.005.20 ± 0.00
0.5–1.00.14 ± 0.010.13 ± 0.010.47 ± 0.000.25 ± 0.020.006 ± 0.0101.70 ± 0.067.50 ± 0.400.75 ± 0.703.55 ± 0.702.95 ± 0.70
30–0.40.12 ± 0.000.12 ± 0.010.46 ± 0.010.28 ± 0.010.018 ± 0.0001.57 ± 0.016.85 ± 0.303.65 ± 0.3011.00 ± 0.005.05 ± 0.10
0.5–1.00.13 ± 0.000.13 ± 0.010.45 ± 0.000.28 ± 0.000.004 ± 0.0031.70 ± 0.017.50 ± 0.200.80 ± 0.803.35 ± 0.302.90 ± 0.40