Effect of Coffee Husk Compost and NPSB Fertilizers on Selected Soil Chemical Properties of Potato Field in Chora District, South West Ethiopia

Table 5

Interaction effect of CHC and NPSB fertilizer on CEC and exchangeable bases of soils of potato field.

Treatment		CEC (meq 100 g^−1)	Exch.Ca^2+ (meq 100 g^−1)	Exch.Mg^2+ (meq 100 g^−1)
CHC	NPSB
0	0	12.12^fg	18.57^e	7.95^g
0	112.5	12.17^fg	18.17^e	7.94^g
0	150	12.15^fg	18.30^e	7.91^g
0	187.5	12.05^g	18.27^e	7.62^g
2.5	0	12.35^efg	18.47^e	10.71^e
2.5	112.5	12.43^efg	19.09^e	11.00^e
2.5	150	13.27^b	20.53^d	10.14^f
2.5	187.5	12.73^cde	20.45^d	10.00^f
5	0	13.10^bc	22.10^bc	11.66^d
5	112.5	12.95^bcd	20.55^d	14.31^a
5	150	13.08^bc	21.40^cd	12.42^c
5	187.5	12.57^def	21.24^cd	13.36^b
7.5	0	14.10^a	21.84^bc	13.30^b
7.5	112.5	14.05^a	21.60^bc	14.06^a
7.5	150	14.08^a	23.22^a	12.35^c
7.5	187.5	13.98^a	22.47^b	11.99^cd
F-test
LSD (0.05)		0.41	0.95	0.56
CV (%)		1.91	2.80	3.06

Means sharing the same letter within a column are not significantly different according to LSD at 5% level of significance; CV = coefficient of variation;  = significant at ;  = significant at ;  = significant at ; CEC = cation exchange capacity; Exch.Ca²⁺ = exchangeable calcium; Exch.Mg²⁺ = exchangeable magnesium; meq = mill equivalent.