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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.