On-Farm Experimentation with Improved Maize Seed and Soil Amendments in Southern Ghana: Productivity Effects in Small Holder Farms

Table 8

Yield components of three maize varieties under four soil amendments in the coastal savannah zone (CSZ) and semideciduous forest zone (SDFZ) in the major cropping season.

Treatments	No. of cobs per plant		No. of kernel rows per cob		No. of kernels per row		No. of kernels per cob		Weight per cob (g)		Cob diameter (cm)		Cob length (cm)
Maize varieties	CSZ	SDFZ	CSZ	SDFZ	CSZ	SDFZ	CSZ	SDFZ	CSZ	SDFZ	CSZ	SDFZ	CSZ	SDFZ
Ahomatea	1.04	1.05	13.2	13.5	30.3	31.3	412	429.5	161	167	3.45	3.93	14.3	14.8
Obatanpa	1.05	1.10	13.7	13.9	32.2	32.5	435	448.8	189	200	4.17	4.30	15.5	15.8
Omankwa	1.07	1.17	14.0	14.7	33.4	33.7	454	463.1	205	220	4.10	4.23	15.4	15.7
Tukey (5%)	0.03	0.03	0.49	0.49	1.11	1.11	21.1	21.1	13.4	13.4	0.11	0.11	0.53	0.53
Soil amendments
Fertilizer	1.12	1.18	14.1	14.8	33.4	34.2	474	479	200	211	4.10	4.35	16.2	16.4
Fert + Man	1.08	1.16	13.9	14.3	32.6	33.6	443	468	198	209	4.09	4.23	15.9	16.1
Manure	1.01	1.07	13.5	13.9	31.9	32.0	422	441	177	192	3.82	4.06	14.8	15.2
Control	1.00	1.01	12.9	13.2	29.9	30.1	399	401	163	170	3.61	4.03	13.4	14.1
Tukey (5%)	0.03	0.034	0.62	0.62	1.39	1.39	26.7	26.7	17.0	17.0	0.13	0.13	0.67	0.67
A × Fert	1.07	1.09	13.7	14.2	32.1	33.5	465	471.8	181	188.1	3.63	4.13	15.8	16.0
A × F + M	1.06	1.08	13.6	13.6	31.1	32.7	430	459.9	181	186.0	3.62	4.12	15.4	15.5
A × M	1.00	1.02	13.0	13.3	30.4	30.3	390	422.0	146	157.2	3.37	3.79	13.5	14.2
A × C	1.00	1.00	12.3	12.8	27.4	28.5	364	364.2	136	135.9	3.19	3.67	12.4	13.6
Obt × Fert	1.14	1.17	14.2	14.3	33.5	34.0	471	476.7	204	214.3	4.37	4.53	16.5	16.9
Obt × F + M	1.08	1.18	13.8	14.1	32.0	33.3	437	465.8	200	209.1	4.35	4.33	16.4	16.4
Obt × M	1.00	1.04	13.6	14.0	32.0	32.2	427	435.9	184	192.2	4.14	4.23	15.4	15.4
Obt × C	1.00	1.02	13.1	13.4	31.2	30.5	414	416.7	166	182.9	3.81	4.12	13.8	14.4
Omk × fert	1.14	1.29	14.5	15.8	34.7	35.0	487	489.2	216	231.0	4.32	4.39	16.2	16.3
Omk × F + M	1.09	1.24	14.4	15.3	34.8	34.9	462	476.8	214	230.8	4.30	4.24	1.61	16.2
Omk × M	1.03	1.13	14.0	14.5	33.2	33.5	448	464.2	202	227.0	3.96	4.18	15.4	15.9
Omk × C	1.01	1.02	13.3	13.4	31.0	31.4	419	422.1	188	191.3	3.83	4.10	13.8	14.4
Tukey (5%)	0.02	0.016	0.87	0.867	0.662	0.662	0.51	0.508	0.70	0.704	0.89	0.892	0.43	0.432

A: ahomatea; Obt: obatanpa; Omk: omankwa; Fert: fertilizer; Fert + Man: fertilizer + manure; M: manure; C: control; No.: number.