Transect / pH / P(PO4) / N / C (total) / C (organic) / CaCO3 / C:N
(mg kg-1) / (%) / (%) / (%) / (%)
1 / 6.59 / (3.24) / 5.62 / (4.93) / 0.32 / (0.32) / 3.86 / (2.35) / 3.70 / (2.31) / 1.33 / (4.49) / 12.56 / (8.60)
2 / 5.77 / (3.43) / 5.89 / (4.74) / 0.34 / (0.33) / 4.40 / (2.87) / 4.16 / (1.87) / 1.95 / (8.45) / 13.60 / (6.50)
3 / 5.48 / (4.06) / 5.42 / (6.04) / 0.32 / (0.26) / 4.48 / (5.35) / 4.18 / (5.35) / 2.46 / (11.59) / 14.17 / (7.05)
4 / 5.06 / (3.91) / 6.21 / (7.22) / 0.44 / (0.89) / 6.11 / (13.54) / 5.95 / (13.54) / 1.32 / (6.23) / 13.39 / (5.64)
5 / 5.50 / (3.94) / 5.05 / (2.88) / 0.43 / (0.45) / 5.59 / (7.62) / 5.44 / (7.62) / 1.26 / (4.50) / 13.03 / (5.85)
6 / 5.11 / (4.11) / 7.75 / (15.86) / 0.35 / (0.41) / 4.81 / (5.00) / 4.68 / (5.01) / 1.08 / (8.26) / 13.74 / (4.61)
Table S1. Summary of soil variables measured across the study site. Highlighted values are means with the range in brackets. All soil analysis was conducted by Forest Research, UK. pH was measured following ISO-10390 using a glass electrode in a 1:5 (volume fraction) suspension of soil in water. Soil phosphorus was determined by separating available phosphorus from total phosphate following extraction by the Mehlich No. 3 method (Mehlich, 1984). Soil carbon and nitrogen concentrations were analysed using a CHN elemental analyser.