Effects of soil and water conservation practices on soil physicochemical properties in Gumara watershed, Upper Blue Nile Basin, Ethiopia

Ecological Processes

Table 7 The relationship (Pearson’s product movement coefficient of correlation) between soil physicochemical properties

Soil properties		pH (H₂O)	SOC (%)	SOM (%)	TN (%)	BD (g cm^-3)	Sand (%)	Clay (%)	Silt (%)	Av. P (ppm)	CEC and Exch. cations [cmol(+) kg⁻¹]
Soil properties		pH (H₂O)	SOC (%)	SOM (%)	TN (%)	BD (g cm^-3)	Sand (%)	Clay (%)	Silt (%)	Av. P (ppm)	CEC	Na⁺	K⁺	Ca²⁺	Mg²⁺
pH (H₂O)		1
SOC (%)		.673**	1
SOM (%)		.673**	1.000**	1
TN (%)		.628**	.959**	.959**	1
BD (g cm^-³)		− .426*	− .702**	− .702**	− .661**	1
Sand (%)		− .248	− .403	− .403	− .481*	.598**	1
Clay (%)		.230	.354	.354	.461*	− .417*	− .608**	1
Silt (%)		− .133	− .192	− .192	− .277	.150	.140	− .871**	1
Av. P (ppm)		.232	− .221	− .221	− .227	.212	.029	.102	− .145	1
CEC & Exch. cations [cmol(+) kg⁻¹]	CEC	.619**	.765**	.765**	.699**	− .756**	− .425*	.339	− .160	.083	1
	Na⁺	.640**	.756**	.756**	.783**	− .496*	− .504*	.463*	− .266	.093	.763**	1
	K⁺	.188	.115	.115	.082	− .228	− .257	− .130	.321	− .053	.232	.331	1
	Ca₂⁺	.669**	.641**	.641**	.553**	− .747**	− .428*	.261	− .061	.183	.931**	.621**	.179	1
	Mg₂⁺	.505*	.741**	.741**	.734**	− .501*	− .304	.295	− .180	− .073	.768**	.807**	.380	.529**	1

Av. P available phosphorous, BD bulk density, CEC cation exchange capacity, SOC soil organic carbon, SOM soil organic matter; **,* the correlation is significant at p < 0.01 and p < 0.05 respectively (two-tailed); TN total nitrogen