Growth and Yield Response of Soybeans (<i>Glycine max (L.</i>) Merr.) Upon Exposure to Gibberellic Acid Concentrations

The aim of the study was to evaluate the response of soybeans exposed to gibberellic acid (GA3) on the growth and yield of soybeans. Field experiments were conducted during the 2019 rainy season at the Botanical Garden of the Federal University of Lafia. Seeds were collected from AGRO TROPICS LTD Lafia, Nasarawa state. The Soybean variety was submerged in various concentrations of GA3 90mg/m, 120mg/m, and 150mg/m respectively). The experiment was laid in a randomized completely block design (RCBD) with three replicates each and one control. Growth and yield parameters were measured. Results showed that GA3 at different concentrations both in 1 and 2 hours of treatment increased the number of leaves (19.85), (24.23) at 90 mg/L and 120 mg/L in 1- and 2-hours exposure time respectively. In the same exposure time (1 hour), treatment 90mg/L increased the plant height (19.98cm) while in 2 hours exposure time, treatments 120 and 150mg/L increased the plant height. The leaf area, number of flowers, and number of seeds increased at 90mg/L at the same exposure time (1 hour) but this was so in the 2 hours concentration as leaf area and number of flowers increased at different treatments 150 mg/L,90mg/L respectively while the number of seeds increased 150 mg/L.