Environmental Systems Research

Table 6 Effect of N and P fertilizer on harvest index of Obatanpa maize at Ejura during major and minor season 2008

From: The effect of phosphorus and nitrogen fertilizers on grain yield, nutrient uptake and use efficiency of two maize (Zea mays L.) varieties under rain fed condition on Haplic Lixisol in the forest-savannah transition zone of Ghana

Treatment combination	Total biomass (kg ha⁻¹)
Treatment combination	N (kg ha⁻¹)	P (kg ha⁻¹)	Expt. 1	Expt. 2	Expt. 3	Expt. 4
N1P1	0	0	0.31	0.25	0.25	0.30
N1P2	0	30	0.28	0.26	0.24	0.23
N1P3	0	60	0.29	0.27	0.24	0.24
N2P1	40	0	0.40	0.39	0.37	0.32
N2P2	40	30	0.38	0.37	0.37	0.36
N2P3	40	60	0.40	0.37	0.38	0.37
N3P1	80	0	0.42	0.41	0.44	0.44
N3P2	80	30	0.43	0.42	0.39	0.40
N3P3	80	60	0.43	0.43	0.40	0.40
N4P1	120	0	0.42	0.42	0.45	0.44
N4P2	120	30	0.44	0.43	0.40	0.39
N4P3	120	60	0.43	0.43	0.41	0.39
Mean			0.39	0.37	0.36	0.36

Effects	F-probability
N	**	**	**	**
P	NS	NS	*	**
N * P	*	NS	NS	**

NS non-significant
*, ** Significant at 0.05 and 0.01, respectively

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