YIELD RESPONSE TO NITROGEN AND BORON APPLICATIONS IN SOYBEAN

Abstract

An experiment was carried out at the Agronomy farm of Sher-e-Bangla Agricultural University, Dhaka during the period from October 2015 to December 2015 to study the yield response to nitrogen and boron applications in soybean. Four nitrogen (N) levels (0, 15, 30 and 45 kg/ha) and four boron (B) levels (0, 0.825, 1.65 and 2.5 kg/ha) were considered as factors for the experiment. There were 16 treatment combinations. The experiment was laid out in a split plot design with three replications. Data were collected on different growth, yield and yield contributing parameters of soybean. Results revealed that 30 kg N/ha and 1.65 kg B/ha as an individual effect and also in combinations, gave the best yield responses in soybean. Individually 30 kg N/ha gave the highest pod length (3.56 cm), number of seed/pod (2.73), 1000 seed weight (109.58 g), seed yield (1249.17 kg/ha), stover yield (1661.17 kg/ha) and harvest index (45.43%) and 1.65 kg B/ha gave the highest pod length (3.46 cm), number of seed/pod (2.67), 1000 seed weight (100.25 g), seed yield (1116.67 kg/ha), stover yield (1508.25 kg/ha) and harvest index (42.70%). Combination of 30 kg N/ha with 1.65 kg B/ha gave the highest number of pods/plant (48.13), pod length (3.68 cm), number of seeds/pod (2.87), 1000 seed weight (120.10 g), seed yield (1453.33 kg/ha), stover yield (1768 kg/ha) and the highest harvest index (45.23%) where control treatment showed lowest performance.