INFLUENCE OF SUPPLEMENTAL AGRONOMIC MANAGEMENT ON GROWTH AND YIELD OF SOYBEAN

Abstract

The experiment was conducted during the period from 14 January. 2014 to 8 May 2014 to study the influence of supplementary agronomic management on growth and yield of soybean. The experiment was carried out by two soybean varieties as V1 : BARI Soybean 5 and V 2 : BARI Soybean 6 and six supplementary managements as M ; : Control i.e. Normal cultivation; M 2: Urea spray at flowering; M3 : MoP spray at flowering; M 4: DAP spray at flowering. M 5: Cytokinin spray at flowering and M e ,: Water stress at flowering of soybean. The experiment was laid out in split-plot design with three replications. Data on different growth parameters. yield attributes and yield were significantly varied for different parameters. The highest dry weight (17.14g plant d) and higher pod remaining (36.35 %) was found from the variety BARI Soybean 6 whereas 1000-seed weight (100.41g) and seed yield (1.15 t hi') in BARI Soybean 5. The supplemental application of DAI (M 4 ) at flowering stage resulted higher dry weight plant (l8.19g) and seeds pod' (2.42). The highest seed yield was given by supplemental urea spray (1.21 t ha) that similar to DAP application (1.18 t ha'). The highest flower and pod droppings (72.77%) were revealed in V 1M6 (BARI Soybean 5) with water stress in reproductive phase). Supplemental application of cytokinin and MoP gave the lowest total dropping (59.56% and 60.16% respectively). The BARI Soybean 5 with application of DAP at flowering resulted the highest seed yield (1.48 t hi') and stover yield (1.26 t hi'). The lowest seed yield (0.79 t hi') was found in the variety BARI Soybean 6 with water stress during reproductive phase.