Effects of Soil and Water Conservation Measures on Soil Quality Indicators: The Case of Geshy Subcatchment, Gojeb River Catchment, Ethiopia

Table 5

Mean values of soil chemical qualities in 0 to 20 cm depth in the Geshy subcatchment.

Slope class (%)	Terrace position	With SWC					Without SWC
		pH-H2O	SOC (%)	TN (%)	C : N ratio	AP (ppm)	pH-H2O	SOC (%)	TN (%)	C : N ratio	AP (ppm)
3–8 (%)	Lower	6.27	3.43	0.28	12.12	3.26	6.43	3.50	0.29	12.21	1.74
	Middle	6.20	3.33	0.28	12.05	3.60	6.33	3.40	0.28	12.00	0.93
	Upper	6.27	2.73	0.23	11.89	4.20	6.37	3.17	0.28	11.28	3.28
	Average	6.24^a	3.20^a	0.26^a	12.01^a	3.69^a	6.38^a	3.36^a	0.28^a	11.83^a	1.98^a
	SD	0.07	0.34	0.03	0.30	1.88	0.10	0.28	0.01	0.36	2.00
8–15 (%)	Lower	6.23	3.47	0.28	15.16	1.08	6.33	3.10	0.26	12.09	3.31
	Middle	6.17	3.33	0.27	12.19	1.85	6.30	2.90	0.25	11.59	1.51
	Upper	6.20	2.80	0.23	9.95	4.26	6.50	2.70	0.23	11.73	1.94
	Average	6.20^a	3.20^a	0.26^a	12.43^a	2.40^ab	6.38^a	2.90^b	0.25^b	11.80^a	2.25^a
	SD	0.12	0.43	0.04	2.49	1.84	0.17	0.32	0.02	0.41	1.55
15–30 (%)	Lower	6.20	3.47	0.28	12.10	1.67	6.23	2.97	0.24	12.36	0.45
	Middle	6.20	3.33	0.27	13.06	0.79	6.30	2.87	0.24	11.95	1.71
	Upper	6.07	2.83	0.23	12.87	2.55	6.40	2.70	0.22	12.09	1.48
	Average	6.16^a	3.21^a	0.26^a	12.68^a	1.67^b	6.31^a	2.84^b	0.23^b	12.13^a	1.21^a
	SD	0.19	0.51	0.04	0.98	1.00	0.14	0.16	0.01	0.29	1.15
Total	Lower	6.23^a	3.42^a	0.27^a	13.12^a	2.00^a	6.33^a	3.19^a	0.26^a	12.22^a	1.83^a
	Middle	6.19^a	3.39^a	0.26^a	12.4^ab	2.08^a	6.31^a	3.06^ab	0.26^a	11.8^ab	1.38^a
	Upper	6.18^a	2.82^b	0.25^a	11.57^b	3.67^b	6.42^a	2.86^b	0.24^a	11.70^b	2.23^a
	Av.	6.20^a	3.21^a	0.26^a	12.38^a	2.58^a	6.36^b	3.03^b	0.25^a	11.92^b	1.82^a
	SD	0.14	0.42	0.04	1.52	1.78	0.14	0.34	0.03	0.46	1.61

Note: overall means followed by the same letter (s) across columns, and rows are not significantly different () with respect to treatments, slope classes, and position within the terraces. SD, standard deviation.