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Table 4 Pearson correlations between soil nutrients and diameter growth with r and p values.

From: Long-term logging residue loadings affect tree growth but not soil nutrients in Pinus contorta Doug. ex Loud. forests

Diameter

2001–2006

2010–2015

Soil

2006

2015

 

r

p

r

p

Total C

− 0.06

0.79

0.75

< 0.001

Total N

− 0.17

0.46

0.63

0.002

C:N

0.39

0.091

0.56

0.009

Avail. P

0.13

0.60

0.73

< 0.001

Exch. K

− 0.01

0.97

− 0.62

0.004

Exch. Ca

− 0.15

0.52

− 0.63

0.003

Exch. Mg

− 0.20

0.39

− 0.63

0.003

  1. “Avail.” means “available”; “Exch.” means “exchangeable”
  2. Total C, total carbon in soil; Total N, total soil nitrogen; C:N, ratio of soil organic carbon to total nitrogen. The soil data were collected in 2006 and 2015, while the diameter growth data were estimated for the annual average increment of the measuring periods of 2001–2006 and 2010–2015. The data were the values from each plot of four treatments, n = 5
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Annals of Forest Science

ISSN: 1297-966X