Table 2: Selected attributes of the soil before planting.

Attribute Mean N (%) 0.037 (0.002) C (%) 0.251 (0.017) C/N 6.84 (0.56) Soil solution P (μmol L−1) 8.95 (0.53) Bicarbonate P (mmol kg−1) 0.25 (0.01) Mineral N (mmol kg−1) 0.25 (0.01) pH 7.25 (0.05)

Data are average of 4 subsamples taken from homogenized soil with standard errors in parentheses.