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Abstract
An experiment was conducted at the Horticulture Farm of the Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh during the period from November, 2018 to April, 2019 to study the effects of planting time and spacing on the growth and yield of carrots under dry land condition at BINA, Mymensingh. Five different planting times viz. November 10, November 20, November 30, December 10 and December 20 and four different spacing’s of 25× 20 cm, 20× 20 cm, 15× 15 cm and 10× 10 cm were used . This experiment was laid out in randomized complete block design with three replications. Planting time showed significant effects on the growth and yield of carrot in respect of plant height, number of leaves, fresh and dry weights of leaves and roots, length ad diameter of roots, gross and marketable yields of carrot. The highest marketable yields (39.70 t/ha) was obtained from November 20 planting, whereas the lowest yields (25.02 t/ha) from December 20 planting. Plant spacing also significantly influenced on all the mentioned parameters. The highest marketable yields (34.95 t/ha) was observed from the closest spacing of 10× 10 cm. In respect of combined effect, November 20 planting with the closest spacing of 10× 10 cm produced significantly the highest marketable (42.29 t/ha) yields of carrot.
 Res. Agric., Livest. Fish.7(3): 373-382, December 2020
Highlights
Carrot (Daucus carota L.) ranks among the top-ten most economically important vegetable crops in the world, in terms of both area of production and market value (FAOSTAT, 2012; Fontes and Vilela, 2003).Carrot is a highly nutritious root crop
Effect of Planting Time Different yield contributing characters and yield of carrot were influenced by plating times at different days after sowing
The tallest plant (54cm) and the maximum no. of leaves per plant(13.33),fresh weight of leaves per plant (72.90g),dry weight of leaves per plant (10.59g), length of root per plant (17.40cm),diameters of root per plant (5.12mm), fresh and dry weight of root per plant (129.99g and 15.39g respectively), gross yield per plant (5.73kg) as well as minimum rotting, cracking and branching of root (3.76%,9.84%and 5.45% respectively),were obtained in November 20 planting .The shortest plant was found in December 20 planting
Summary
Carrot (Daucus carota L.) ranks among the top-ten most economically important vegetable crops in the world, in terms of both area of production and market value (FAOSTAT, 2012; Fontes and Vilela, 2003).Carrot is a highly nutritious root crop. It is used as raw as salad and in making processed food like halua, polao, sweets etc. Carrot is cultivated in Bangladesh in a very limited scale This may be due to unawareness of our vegetable growers about the proper management practices of the crop including proper planting time and selection of proper spacing. Planting carrot from November 15 to early December is reported to be the best time for increased yield (Rashid, 1993) whereas, other authors reported that late planting gave low yield and enhanced disease infestation
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