An experiment was conducted at the Horticulture farm of Bangladesh Agricultural University, Mymensingh during the period from December, 2006 to March, 2007 to evaluate the effect of NPKS on the growth and yield of carrot. Various doses of NPKS viz. 0,59,78, and 98kg N; 0, 54, 72 and 90kg P; 0, 65, 87, and 109kg K and 0,10,14, and 18 kg S/ha and cow dung only (4t/ha) were tested in 15 treatment combinations. The experiment was laid out in Randomized Complete Block Design with three replications. The treatments had significant effect on plant height, number of leaves, fresh weight of leaves and roots, root length and root diameter, percent cracked root, branched root and rotten roots, gross yield and marketable yield of carrot. The maximum plant height, number of leaves, fresh weight of leaves and root per plant, root length and root diameter, cracked root and branched root were obtained from the N98P72K87S14Kg/ha treatment. The highest marketable yield (38.53/ha) resulting maximum economic return (Tk. 1,62,575/ha) with a benefit cost ratio of 4.29 was produced by N98P72K87S14Kg/ha while the lowest yield of carrot (19.40 t/ha) was obtained from the control treatment (no manure and fertilizer).
Key words: Nutrient, carrot, root yield, marketable yield
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