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Multi-seeded onions. II. Effect of block spacing and transplant age on yield of onions

Tadeusz Wojtaszek, Edward Kunicki, Franciszek Bednarz, Małgorzata Poniedziałek

Institute of Vegetables and Ornamental Plants
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Kraków, Poland

In a two-year trial 30, 40, and 50 days old onion seedlings of the cultivar Wolska were raised in peat blocks with a target population of 5 plants/block, the blocks being spaced 30×20, 30×15, and 30×10 cm apart, giving target densities of 83.3, 111.1, 166.7 plants/m2. The marketable yield of multi-seeded onions was not affected by transplant age but increased significantly with increased plant density, ranging from 44.7 to 56.5 and from 46.8 to 49.5 t/ha in the 1987 and 1988 seasons respectively. The widest spacing consistently produced the highest proportion of bulbs over 50 mm in diameter in the marketable yield, giving 30.4 and 25.3 t/ha of bulbs over the 50 mm size grade in the 1987 and 1988 seasons respectively.

Wojtaszek T., Kunicki E., Bednarz F., Poniedziałek M., 1993. Multi-seeded onions. II. Effect of block spacing and transplant age on yield of onions. Folia Horticulturae V/1: 11-18.