Response of Yield and Quality of Soybean (cv. BARI Soybean-6) to Phosphorus and Sulphur Fertilization under Old Brahmaputra Floodplain Soil of Bangladesh.

Background: Soybean is a potential oil seed crop in Bangladesh due to its heavy consumption throughout the country. The lower yield of soybean in Bangladesh compared to the world context might be due to non-judicious fertilization especially phosphorus (P) and sulphur (S). Hence, the study was undertaken to find out the influence of P and S on yield and quality of soybean. Methods: An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Bangladesh. The study comprised four levels of phosphorus viz. 0, 20, 40 and 60 kg P ha-1 and four levels of sulphur 0, 15, 30 and 45 kg S ha-1. The experiment was laid out in a factorial randomized completed block design with three replications. Result: The highest number of branches plant-1, pods plant-1, 100-seed weight, seed yield, harvest index, protein and oil content were found in 60 kg P along with 30 kg S ha-1 while the lowest seed yield, protein and oil content were found in control. Therefore, application of 60 kg P with 30 kg S appeared as the promising practice for obtaining higher seed yield and better quality of BARI Soybean-6. [ABSTRACT FROM AUTHOR]