India is the second largest producer and third largest exporter of onion in the world. Onion represents the sole item in the list of fruits and vegetables where Indian figures prominently in the world production and export. Indian onions are famous for their pungency and are available round the year. The demand for bulb onion as well as quality seeds are increasing day by day and the price of seeds remain fairly high in each season. To sustain onion production, it is very difficult to increase yield horizontally, but there exists a great scope to do the same vertically that could be achieved by using good quality seed. The quality of onion seed production is still dealt by small farmers, who have inadequate knowledge for selecting proper grade of bulb and spacing of plant. This both factor reflected their effect on seed production of onion. Therefore, it is essential to generate new knowledge and technologies regarding seed quality attributes for increased production of onion. all those above reason, the present study was conducted to investigate the effect of bulb size and spacing on quality seed production of onion. ukryj opis