Yadav, L. M.Maurya, Pankaj Kumar2018-02-122018-02-122017http://krishikosh.egranth.ac.in/handle/1/5810040813Onion (Allium cepa L.), the “Queen of the Kitchen” is one of the most commercially valuable vegetables grown in India. The present production level of onion in India as well as in Bihar in not sufficient to meet out the requirement of growing population, which can possibly be increased by judicious use of macro and micro nutrients. Keeping this fact in view, the present investigation entitled “Effect of micronutrient application on growth, yield and quality of kharif onion (Allium cepa L.) was carried out during Kharif season of 2016-2017 at Kothi farm of Tirhut College of Agricultural Dholi, (Muzaffarpur), of Dr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur) in calcareous soils with ten treatments and three replication under randomize block design with the objectives to study the effect of micronutrients on growth, yield attributes, quality & shelf life of onion. To draw certain conclusion both the quantitative and qualitative plant characters were recorded and analysed. Soil application of ZnSO4 @ 50kg/ha with recommended dose of NPKS (120: 80: 100:40) recorded the maximum plant height and number of leaves per plant at 30, 45 and 60 DAT, average weight of bulb, A grade bulb, B grade bulb, marketable bulb yield, marketable bulb percent, total bulb yield, TSS, dry weight of leaves per plant, dry weight of bulbs per plant, whereas soil application of Borax @ 15 kg/ha along with recommended dose of NPKS showed maximum polar and equatorial diameter values. The lowest collar thickness at 30, 45 and 60 DAT, neck thickness, doubler bulbs, bolters, C grade bulb and minimum bulb sprouting at 7, 14 and 21 DAH were found in treatment NPKS + soil application of ZnSO4 @ 50kg/ha, whereas soil application of Borax @ 10 kg/ha along with recommended dose of NPKS gave minimum sugar contents, physiological loss in weight, bulb rotting. Overall soil application of ZnSO4 @ 50kg/ha along with recommended dose of NPKS (120: 80: 100:40) was found to be better for onion.ennullThesis