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Effect of mother bulb size, planting space and nitrogen level on onion seed yield and its quality [electronic resource].

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Sorour, S. Gh. R

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Language: English Summary language: Arabic Description: p.21-33Other title:

تأثير حجم الابصال ومسافات الزراعة ومعدلات التسميد النيتروجيني علي انتاج وجودة بذرة البصل [Added title page title]

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Journal of agricultural research Tanta University, 2003 v.29 (1) [electronic resource].

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In: Journal of Agricultural Research Tanta University 2003.v.29(1)Summary: Two field experiments were carried out at the Experimental Farm of Sakha Agricultural Research Station.' Kafr El-Sheikh, Egypt. The experiments were carried out during 1999/2000 and 2000/2001 seasons to study the effect of three mother bulb sizes (3, 3-5 and >5 cm in diameter). three planting spaces (15. 25 and 35 cm apart) and three nitrogen levels (60. 90 and 120 kg N/fed.) on seed production and its quality of onion cultivar Giza 20. The treatments were arranged in split-split plot design with four replications. The main findings could be summarized as follows: . The obtained results reveal that mother bulb size had a significant effect on number of sprouts and scapes/plant. dry weight of umbels/plant. seed yield per plant and per feddan. 1000-seed weight in both growing seasons as well as on diameter of main umbel in 2000/2001 season and on weight of seed/umbel in 1999/2000 season. The highest values of all these traits were obtained with sowing the largest mother bulb size. On the other hand. seed setting and seed germination percentages were not significantly affected by mother bulb size in the two seasons of study.

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Two field experiments were carried out at the Experimental Farm of Sakha Agricultural Research Station.' Kafr El-Sheikh, Egypt. The experiments were carried out during 1999/2000 and 2000/2001 seasons to study the effect of three mother bulb sizes (3, 3-5 and >5 cm in diameter). three planting spaces (15. 25 and 35 cm apart) and three nitrogen levels (60. 90 and 120 kg N/fed.) on seed production and its quality of onion cultivar Giza 20. The treatments were arranged in split-split plot design with four replications. The main findings could be summarized as follows: . The obtained results reveal that mother bulb size had a significant effect on number of sprouts and scapes/plant. dry weight of umbels/plant. seed yield per plant and per feddan. 1000-seed weight in both growing seasons as well as on diameter of main umbel in 2000/2001 season and on weight of seed/umbel in 1999/2000 season. The highest values of all these traits were obtained with sowing the largest mother bulb size. On the other hand. seed setting and seed germination percentages were not significantly affected by mother bulb size in the two seasons of study.

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