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Two field experiments were conducted to study the effect of plant density on yield, size grading and maturity of onion bulbs grown from seeds. In the first experiment carried out during 1991-1993, three onion cultivars (Hysam F1, Mercato F1, and Sochaczewska) were sown for intended densities of 20, 40, 60, 80,100 and 140 plants m-2, whereas in the second one, in 1996, six onion cultivars (Spirit F1,...
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