YIELD PERFORMANCE OF SOYBEAN VARIETIES UNDER DIFFERENT FERTILIZER LEVEL

Abstract

A field experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University to find out the combination effect of variety and different fertilizer level on the yield of soybean, cultivated during December, 2021 to April, 2022. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The four varieties included in this study were BINAsoybean5;

BU soybean 2; BARI Soybean-5 and BARI Soybean-6. There were four fertilizer combinations. Such as F 0 = No fertilizer, F 1 = 50% less than recommended dose of fertilizer (RDF); F 2 = Recommended dose of fertilizer (RDF); F 3 = 50% more than recommended dose of fertilizer (RDF). Among all the varieties, BU soybean 2 (V 2 ) emerged as the superior performer, showcasing the tallest plant height at harvest (59.55 cm), highest dry weight plant -1 at harvest (6.94 g), maximum number of pod plant -1 (29.75), seed pod -1 (2.60), weight of 100 seeds (14.03 g) and leading seed and stover yield of 3.20 t ha -1 and 5.53 t ha -1 , respectively. On the other hand, among the fertilizer doses, F 3 (50% more than recommended dose of fertilizer), proved most effective, yielding the tallest plant at harvest (60.28 cm), highest dry weight plant at harvest (6.76 g), maximum number of pod plant -1 (32.73), seed pod -1 (2.44), weight of 100 seeds (12.29 g), and the leading seed and stover yield of 3.21 t ha

respectively. But in the case of combination between varieties and different doses of fertilizer, V 2 F 3 (BU soybean 2 with 50% more fertilizer than the recommended dose) treatment gave the best results. The tallest plant at harvest (67.55 cm), highest dry weight plant -1 at harvest (7.49 g), maximum number of pod plant -1 -1 and 5.75 t ha (35.61), seed pod

(3.00), weight of 100 seeds (15.52 g), leading seed and stover yield of 4.52 t ha and 7.22 t ha -1 was recorded in V 2 F 3 (BU soybean 2 with 50% more fertilizer than the recommended dose). It may be concluded that the BU soybean 2 (V 2 ) variety and the F 3 fertilizer dose individually exhibited notable results, but their combination in the V 2 F 3 treatment yielded unparalleled performance, achieving the most impressive growth and highest seed and stover yields, highlighting the profound impact of optimizing both variety and fertilizer.