Effect of 26 Years of Intensively Managed Carya cathayensis Stands on Soil Organic Carbon and Fertility

Table 2

Changes in soil properties under C. cathayensis forest stands after 26 years  intensive management.

Soil layer	A horizon		B horizon
Sampling year	1982	2008	1982	2008
pH	7.1±0.13^a	6.4±0.26^b	6.9±0.20^a	6.4±0.15^a
SOC (g kg^−1)	25.03±0.84^a	20.12±0.13^b	17.56±1.72^a	14.92±0.67^a
Total N (g kg^−1)	2.52±0.09^a	1.97±0.11^b	1.86±0.43^a	1.56±0.37^a
Total P (g kg^−1)	0.66±0.36^a	0.61±0.34^a	0.52±0.28^a	0.48±0.28^a
Total K (g kg^−1)	6.09±1.45^a	5.26±1.23^a	5.99±1.28^a	5.18±1.28^a

Notes: for each soil horizon, values within a row followed by the same letter do not differ significantly.