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Effect of storage, bulb size, spacing, and time of planting on production of onion see


Effect of storage, bulb size, spacing, and time of planting on production of onion see



California Agric Exp Sta Bull 628: 1-14



The best temp. at which to store onion mother bulbs of a highly non-bolting strain of the Ebenezer var. was about 53.5[degree] F. Plants from bulbs stored at this temp. for about 3 months bloomed and ripened their seed earlier, produced more seed stems and yielded more seed per acre than plants from mother bulbs stored at higher or lower temps. In a comparison of 8 sizes of mother bulbs of the Yellow Globe Danvers var. ranging in weight from about 15 to 90g., there was an increase in number of seed heads per plant, in seed yield per plant, and in seed yield per acre with each increase in size of bulb. When bulbs were set 3, 4, 6, 8 and 12 inches apart in the row, a significant increase in seed yield per plant was secured for each increase in spacing but a decrease in yield of seed per acre. Delay in planting date caused a delay in time of seed maturity and a decrease in yield of seed.

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