Maize Hybrids Response to High Plant Density in the Guinea Savanna of Nigeria.

Plant density is among the four grain yield components exerting a large impact on attainable corn (Zea mays L.) yield. Corn yield responds highly to changes in plant density when compared to similar crops such as sorghum. Identifying an optimal plant density is a critical management decision for corn (Zea mays L.) production. Ten maize hybrids were evaluated at two plant populations (53333 and 88888 plants ha^-1) in two locations in northern Guinea Savannas of Nigeria. Total dry matter and yield and yield components were significantly affected by plant population. Yield and yield component were also significantly affected by the maize hybrid in both locations. There were significant interactions between plant population and maize hybrid for number of grain m^-2, 500 grain weight, and total dry matter in both locations and for grain yield in Zaria. Number of grain m^-2, total dry matter, and grain yield were generally higher for maize hybrids planted at population of 88888 than those for maize hybrids planted at 53,333 plants ha^-1. Hybrid performance depended on location with the hybrids performing better in Zaria than in Tundu Wada. In Tudun Wada, best performing hybrids were M10926-10 and M1227-12. In Zaria, the best performing hybrids were M10926-8, M10926-10, M1227-12 and M1227-14.