Organic Farming Practices on Different Kohlrabi (Brassica oleraceae var. gongylodes) Cultivars

An experiment was conducted at Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during October to December 2008, to study the effect of organic farming practices on different kohlrabi (Brassica oleraceae var. gongylodes) cultivars. The experiment was conducted in split-plot Randomized Complete Block Design with three replications. Two factors were used in the experiment viz. four types of organic manures viz., OM₀=Control/no manure, OM₁=Cowdung (30 t ha⁻¹), OM₂=Poultry manure (25 t ha⁻¹) and OM₃=Vermicompost (20 t ha⁻¹) and five cultivars of kohlrabi viz. V₁=Quick star, V₂=UFO, V₃=White Vienna, V₄=Sufala-14 and V₅=Early 0058 were used in the experiment. In case of different cultivars, the higher plant (40.80 cm), number of leaves (16.73), leaf length (33.40 cm), leaf breadth (15.00 cm), fresh leaves weight plant⁻¹ (155.20 g), diameter of knob (9.32 cm), knob weight (366.60 g), yield ha⁻¹, (27.14 t ha⁻¹) were found in white Vienna (V₃). Incase of organic manures, the maximum plant height (36.50 cm), plant canopy (63.50 cm), leaf length (30.42 cm), leaf breadth (14.25 cm), fresh leaves weight plant⁻¹ (131.10 g), diameter of knob (8.23 cm), knob weight (366.60 g), yield ha⁻¹ (22.90 t ha⁻¹) were found by poultry manure (OM₂) application. Incase of combined effect of organic manures and different kohlrabi cultivars, the maximum plant height (43.00 cm), plant canopy (73.00 cm), leaf length (38.00 cm), diameter of knob (10.17cm), Knob weight (442.70 g), yield ha⁻¹ (32.78 t ha⁻¹) were found in white Vienna (V₃) with poultry manure (OM₂). The maximum number of leaves (16.73) were found in quick star (V₁) with control (OM₀), the maximum leaf breadth (15.00 cm) were found in sufala-14 (V₄) with Vermi-compost (OM₃), the maximum fresh leaves weight plant⁻¹ (155.20 g) were found in sufala-14 (V₄) with poultry manure (OM₂).