A field experiment on efficacy of different organic manures on sustainable yield and soil fertility under cauliflower production was conducted in the Grey Terrace Soil (AEZ-28) of Gazipur during the years of 2018-19 to 2019-20. Snow white variety of cauliflower was used as test crop. There were eight treatments viz. T1: Native nutrient, T2: Poultry manure @ 10 t ha-1, T3: Cowdung @ 20 t ha-1, T4: Farm Yard Manure   @ 18 t ha-1, T5: Vermicompost @ 15 t ha-1, T6: Compost @ 15 t ha-1, T7: Tricho-Compost @ 10 t ha-1,        T8: Bioslurry @ 15 t ha-1. Forty percent of recommended N and K fertilizer as common & basal doses applied in experimental field. The experiment was laid out in RCB design with three replications. Data revealed that, the T5 treatment produced the highest average yield (42.0 t ha-1) of the two years of cauliflower. This trend of influence was consistent for almost all the yield contributing characters of cauliflower. The native nutrient treatment produced the lowest average yield (13.32 t ha-1). The average uptake of nutrients by cauliflower curd was highest in the treatment T5 (vermicompost) which was followed to T8 (Bioslurry) treatment. The lowest nutrient uptake was noted from T1 (control) treatment. In post-harvest soil analytical results explored that application of different organic manure with minimum amount of chemical fertilizers enhances the soil fertility. The highest gross margin (4,03,700 Tk.ha-1yr-1) and MBCR (3.13) was noted from T8 (Bioslurry) treatment.

Key words: Cauliflower, yield, vermicompost, bioslurry, nutrient uptake, soil fertility