EFFECT OF DIFFERENT LEVELS OF NITROGEN AND PLANT SPACING ON GROWTH AND YIELD OF ONION

EFFECT OF DIFFERENT LEVELS OF NITROGEN AND PLANT SPACING ON GROWTH AND YIELD OF ONION (ALLIUM CEPA L.) UNDER LATERITIC BELT OF BIRBHUM DISTRICT IN WEST BENGAL

Amit Kumar1, B. V. G. Prasad1, S. Chakravorty2 and A. Pariari2
Department of Crop Improvement, Horticulture and Agriculture Botany (CIHAB),
Institute of Agriculture,Visva-Bharati, Sriniketan-731236, West Bengal, India1.
Department of Spice and Plantation Crops, Faculty of Horticulture,
Bidhan Chandra KrishiVisvavidyalaya, Mohanpur, Nadia, West Bengal, India2
email: prasadbvg@hotmail.com
Received: 19-09-2014 Accepted: 01-10-2014
Abstract:

The present investigation was undertaken at Horticulture farm, Institute of Agriculture, Visva-Bharati University, West Bengal (India) during winter (rabi) season from September 2012 to March 2013 to study the effect of nitrogen and spacing on growth and yield of onion. The experiment consisted of nine treatment combinations with three levels of nitrogen (100, 150 and 200 kg/ha) and three levels of spacing (10 cm x 10 cm, 15 cm x 10 cm, 15 cm x 15 cm). The experiment was laid out in randomized complete block design in factorial arrangement with three replications. Results of the experiment reviled that application of 200 kg N ha-1 and 15cm x 15 cm produced the highest results for plant height, number of leaves, Bulb polar and equatorial diameter. Among combinations of different levels of nitrogen and spacing, application of 150 kg N ha-1 along with spacing of 15cm x 10cm was found to be the best combination in enhancing the onion yield (37 t/ha) with maximum (2.84) benefit: cost ratio.

Keywords: rabi, growth, yield, onion, block design, benefit: cost ratio
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