Effect of Seed Distribution and Population on Maize (Zea mays L.) Grain Yield

Table 2

Linear regression results including coefficient of variation, , slope, and slope significance for the relationship between grain yield with normalized difference vegetation index (NDVI) and intercepted photosynthetically active radiation (IPAR) and between plant population at harvest and number of ears harvested at LCB and Efaw locations, 2012 and 2013.

Year	Dependent variable	Independent variable	C.V (%)	Slope	Slope significance	Model
Efaw
2012	Grain yield	V8 NDVI	16.5	15.60	<0.0001^***	0.53
2012	Grain yield	IPAR	23.6	0.01	0.3201^ns	0.04
2013	Grain yield	V8 NDVI	16.0	16.00	<0.0001^***	0.61
2013	Grain yield	IPAR	29.3	6.10	0.0011^***	0.32
2012	Plant population	Number of ears	7.1	0.74	<0.0001^***	0.97
2013	Plant population	Number of ears	4.1	0.94	<0.0001^***	0.99
LCB
2012	Grain yield	IPAR	42.0	4.14	0.1196^ns	0.10
2012	Grain yield	V8 NDVI	44.0	3.10	0.2835^ns	0.05
2012	Plant population	Number of ears	39.5	0.40	<0.0001^***	0.47

C.V: coefficient of variation; : regression coefficient; ^***significant at 0.01 level of probability; ns: not significant.