~ 2514 ~ International Journal of Chemical Studies 2020; 8(1): 2514-2516 P-ISSN: 2349–8528 E-ISSN: 2321–4902 IJCS 2020; 8(1): 2514-2516 © 2020 IJCS Received: 24-11-2019 Accepted: 26-12-2019 Anoj Yadav Department of Horticulture, School of Agricultural Sciences and Technology, Babasaheb Bhimrao Ambedker University, Lucknow, Uttar Pradesh, India RB Ram Department of Horticulture, School of Agricultural Sciences and Technology, Babasaheb Bhimrao Ambedker University, Lucknow, Uttar Pradesh, India Rubee Lata Department of Horticulture, School of Agricultural Sciences and Technology, Babasaheb Bhimrao Ambedker University, Lucknow, Uttar Pradesh, India GC Yadav Department of Horticulture, School of Agricultural Sciences and Technology, Babasaheb Bhimrao Ambedker University, Lucknow, Uttar Pradesh, India Corresponding Author: Anoj Yadav Department of Horticulture, School of Agricultural Sciences and Technology, Babasaheb Bhimrao Ambedker University, Lucknow, Uttar Pradesh, India Effect of INM on growth, bulb yield and quality of onion ( Allium cepa L.) cv. Agrifound Dark Red Anoj Yadav, RB Ram, Rubee Lata and GC Yadav DOI: https://doi.org/10.22271/chemi.2020.v8.i1al.8647 Abstract The present experiment was carried out on onion cultivar Agrifound Dark Red during Rabi season 2018- 19 with objective to know the effect of integrated nutrient management (INM) on growth, bulb yield and quality of onion. The experiment was laid out in a randomized block design with three replications. The treatments consisted of T1 -Control, T2 – 100% NPK, T3– 75% NPK +Azotobactor, T4 – 75% NPK + PSB, T5 – 75% NPK + Azotobactor + PSB, T6- 50% NPK + Azotobactor, T7 - 50% NPK +PSB, T8 - 50% NPK + Azotobactor + PSB, T9 - 100% NPK + Vermicompost. Results revealed that application of different levels of fertilizers, viz., organic manures and biofertilizers either alone or in combination significantly increased the growth, bulb yield and quality of onion as compared to control. The maximum bulb yield (235.483q/ha) and diameter of bulb (4.443cm) were recorded with 100% NPK + Vermicompost. Keywords: Onion, integrated nutrient management, chemical fertilizers, organic manures, biofertilizers, growth, bulb yield quality Introduction Onion (Allium cepa L.) is known as “Queen of Kitchen” is one of the most important vegetable grown in India. It belongs to the family Alliaceae and genus Allium is very large comprising of more than 500 species usually perennial bulbous plants. Alliums are among the oldest cultivated plant species. It is consumed as a vegetable and condiment. Green leaves, immature or mature bulbs of onion are eaten as green vegetable. It is indispensible item in every kitchen or condiments and used to enhance flavor of different recipes and hence commands an extensive internal market. The green leaves and immature and mature bulbs are eaten raw or used in preparation of vegetable. On account of its special characteristic of pungency, it is valued much. Onions are used in soups, sauces and for seasoning foods. Attention is given to crispness, Juiciness, pungency and keeping quality of the bulb. The small bulbs and shallots are pickled in vinegar or brine. Dehydrated bulb or onion powder is in great demand which reduces transport cost and storage losses. Dried onion flakes can be reconstituted by cooking in water. Nutrient management is one of the most important considerations under organic production system. The increasing cost of chemical fertilizers and their harmful effects on the soil health is also an important consideration for the use of organic nutrients (Patel et al., 2005). Average marketable yield of onion is very low as compared to other onion producing countries. One of the reason for low yield is used of inadequate and unbalanced fertilization. So concept of adding bio-fertilizer is required to be adjusted along with judicious combination of chemical and organic fertilizers. In North India, only one crop of onion crop known as late Rabi or summer season is grown widely and it arrives in the market from May to June. It is cultivated in all type of soils but sandy-loam soil is the best. All the recommendations so for noticed are only for the normal soil. Least information is available with regard to nitrogen and potassium fertilization in onion bulb production on semi reclaimed sodic soil under the conditions of Lucknow. Materials and Methods The present experiment entitled was carried out at the Horticulture Research Farm-II, Babasaheb Bhimrao Ambedkar University, Lucknow during Rabi season in 2018-2019. Trial