Growth and Yield of Various Maize Varieties Grown at Different Planting Distances

This study aimed to evaluate the interaction effect between maize varieties and planting distances on the growth and yield of maize plants. Three maize varieties used were NK 7328, Bisi-18, and Pioneer 27, with two planting distance treatments: 70x20 cm and 75x25 cm. The study employed a Split-Plot Design and was conducted in Takalar Regency, South Sulawesi. The analysis results showed that variety had a significant effect on most growth and yield parameters, including plant height, number of leaves, male and female flowering time, cob length, cob diameter, and yield. The Pioneer 27 variety produced the highest yield (6.67 tons/ha), followed by NK 7328 and Bisi-18. Meanwhile, the planting distance of 70x20 cm resulted in higher yields compared to 75x25 cm. There was no significant interaction between variety and planting distance on yield, although certain varieties responded better to specific planting distances. The study concluded that a combination of superior varieties and optimal planting distances can significantly increase maize productivity. These results can serve as a reference for agronomic decision-making to improve maize production in tropical areas.