Is Ridge Cultivation Sustainable? A Case Study from the Haean Catchment, South Korea

Table 2

The average topsoil properties of 32 dryland fields and 16 forest sites in the Haean catchment.

Parameter	Dryland sites		Forest sites
	Mean (%)	Std. dev. (%)	Mean (%)	Std. dev. (%)
N	0.06	0.02	0.41	0.17
C	0.53	0.30	5.77	2.47
SOM^a	0.98	0.53	9.92	4.25
Clay	5.43	2.98	12.27	4.87
Silt	22.32	7.10	38.81	9.79
Sand	72.26	9.97	48.91	14.01

aSoil organic matter; note that SOM of forest sites was estimated by multiplying C by 1.72.