Vertical Distribution of Soil Organic Carbon and Nitrogen in a Tropical Community Forest of Nepal

Table 1

Bulk density, organic carbon, nitrogen, and C/N ratio in different soil layers.

Soil layer (cm)	Average bulk density (gm/cm^3)	value	Average organic carbon (%)	value	Average nitrogen (%)	value	C/N ratio	value
0–20	1.18	0.193	1.46	0.001	0.17	0.001	8.59	0.001
21–40	1.28		1.10		0.13		8.46
41–60	1.24		0.84		0.09		9.33
61–80	1.34		0.77		0.07		11.00
81–100	1.36		0.76		0.05		15.20
Mean (0–100 cm)	1.28		0.99		0.10		9.90

Significance difference at 5% level of significance. A value is a measure of probability used for hypothesis testing. If we have a value less than 0.05, the null hypothesis would be rejected in favor of the alternative hypothesis indicating dissimilarity of at least one mean from the rest.