Effect of Nitrogen and Potassium on the Yield Components of BARI Bush Bean-2 and Post-harvest Nutrient Status of the Soil

A field experiment was carried out at Sher-e-Bangla Agricultural University Farm during the Rabi season of 2008 to investigate the effect of nitrogen and potassium on the yield and yield components of BARI Bush Bean-2. The red brown terrace soil of Tejgaon was silty clay loam in texture having pH 5.6. The experiment was conducted in a Randomized Complete Block Design (RCBD) with three replications. The experiment comprises 4 levels of nitrogen in the form ofurea (0, 40, 80 and 120 kg nitrogen/ha) and 4 levels of potassium from Muriate of Potash (0, 20, 40 and 60 kg potassium /ha). There was combination of sixteen treatments including control (no fertilizer). The results obtained revealed that different levels of nitrogen and potassium showed significant variations on the parameters studied. The treatment N80K40 (80 kg nitrogen + 40 kg potassium) gave the highest pod length (11.67 cm), pod diameter (3.13 cm), average single pod weight (5.99 g), total pod weight per plant (29.07 g), pod yield per plot (2033.33 g) and pod yield per hectare (4.96 tons).Thus the findings of the experiment suggested that combined use of 80 kg nitrogen + 40 kg potassium produced the maximum yield of BARI Bush Bean-2 in red brown terrace soil of the Tejgaon series.