Environmental Systems Research

Table 7 Linear correlation coefficient (r) values between some physicochemical properties of soils of the study area

From: Assessment of soil fertility status of Vertisols under selected three land uses in Girar Jarso District of North Shoa Zone, Oromia National Regional State, Ethiopia

	Sand	Silt	Clay	BD	pH	OC	TN	AP	Ca	Mg	K	Na	CEC	EA	Fe	Mn	Cu
Silt	0.06
Clay	−0.93**	−0.43
BD	−0.92**	−0.01	0.90**
pH	0.85**	0.41	−0.87**	−0.68**
OC	0.87**	−0.05	−0.65**	−0.85**	0.47*
TN	0.84**	0.03	−0.18	−0.86**	0.55**	0.99**
AP	−0.03	0.07	0.31	0.42	−0.72**	0.13	0.03
Ca	0.90**	−0.27	−0.74**	−0.78**	0.79**	0.57**	0.58**	−0.59**
Mg	0.82**	−0.46*	−0.57**	−0.68**	0.65**	0.66**	0.34	−0.47*	0.95**
K	0.84**	0.56**	−0.94**	−0.80**	0.81**	0.50*	0.55**	−0.38	0.71**	0.53*
Na	0.44*	−0.51*	−0.21	−0.16	0.57**	0.03	0.07	−0.52*	0.79**	0.77**	0.06
CEC	0.95**	0.21	−0.94**	−0.82**	0.96**	0.64**	0.65**	−0.50*	0.85**	0.75**	0.89**	0.51*
Ex.A	−0.59*	0.07	0.42	0.37	−0.83**	−0.26	−0.35	0.89**	−0.66**	−0.55**	−0.42	−0.74**	−0.64**
Fe	0.52*	0.28	−0.58**	−0.70**	−0.38	0.87**	0.85**	−0.51*	0.15	0.13	0.40	−0.46*	0.36	0.14
Mn	−0.20	−0.03	0.19	−0.13	−0.62**	0.24	0.37	0.89**	−0.35	−0.32	−0.20	−0.41	−0.43	0.79**	0.56**
Cu	0.89**	0.29	−0.91**	−0.93**	−0.32	0.91**	0.85**	−0.26	−0.12	0.01	0.24	−0.47*	0.94**	0.21	0.50*	0.49*
Zn	0.65**	0.05	−0.35	−0.79**	0.03	0.86**	0.75**	0.08	−0.02	−0.02	0.08	−0.24	0.70**	0.24	0.74**	0.78**	0.79**

BD bulk density, OC organic carbon, TN total nitrogen, AP available phosphorus, CEC cation exchange capacity, EA exchangeable acidity
* Significant at P = 0.05, ** Significant at P = 0.01

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