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Table 5 Mean soil properties across all plots using a paired sample two-tailed t-test

From: Assessing drivers of plantation forest productivity on eroded and non-eroded soils in hilly land, eastern North Island, New Zealand

  Non-eroded Eroded % Difference Probabilitya
Total carbon (%) 3.7 2.0 47 ***
Total nitrogen (%) 0.3 0.1 52 ***
C:N ratio 12.9 14.0 8 *
Total phosphorus (mg kg−1) 371.0 215.0 43 ***
Soil organic matter (%) 8.9 5.7 36 ***
Bray-II P 1st extraction (mg kg-1) 52.0 33.0 36 *
Bray-II P 2nd extraction (mg kg-1) 27.0 16.0 41 *
Bray-II P 3rd extraction (mg kg-1) 16.0 10.0 38 *
Soil pH 5.6 5.5 3 *
Mean soil depth (m) 0.4 0.3 16 *
Mean A horizon thickness (m) 0.2 0.2 12 ns
Bulk density (g m−3) 1.1 1.0 5 ns
  1. aProbability: ***p = 0.001; ** p = 0.01; *p = 0.05; ns = not significant.