Abstract
A field experiment was carried out during two consecutive rainy seasons (2008 and 2009) at Gedarif University Research Farm. The objective was to assess the effect of two seedbed preparation methods, five nitrogen fertilizer rates and their interactions on the performance of a sunflower (Helianthus annuus L.) hybrid (Hysun-33). The seedbed preparation methods were; conventional plowing (7 cm deep) using wide level disk and un-plowing. Nitrogen fertilizer in form of urea (46% N) was applied at rates of 0, 47.6, 95.2, 142.8 and 190.4 kg urea/ha. The experiment was arranged in a randomized complete block design in factorial arrangement with four replications. The urea was applied four weeks after crop emergence. Preparing the seedbed by the wide level disk accelerate the emergence and flowering of sunflower crop compared to un-plowed. Plowing seedbed had significantly and positively affected the sunflower attributes and significantly (P > 0.001) out yielded the un-plowed seedbed by 22%. But no significant difference in soil moisture content between seedbed preparation methods was detected. Neither urea application nor its interactions with seedbed preparation methods had an effect on all growth attributes and grain yield of sunflower. It can be concluded that good seedbed preparation is necessary for improving sunflower production whereas the effect of urea application is minor for improving the yield of the crop under rain- fed conditions.
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Claims 7
Claim · model-written summary
Plowing the seedbed increased sunflower yield by 22% compared with the un-plowed seedbed.
- Taxon
- sunflower
Helianthus annuuse1 - Material
- Hysun-33e1
- Treatment
- Plowing seedbede2
- Outcome
- yielde2
- Direction
- out yieldede2
- Value
- 22%e2
- Qualifier
- P > 0.001e2
- Comparator
- un-plowed seedbede2
- Setting
- Gedarif University Research Farme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field experiment was carried out during two consecutive rainy seasons (2008 and 2009) at Gedarif University Research Farm”
e1“on the performance of a sunflower (Helianthus annuus L.) hybrid (Hysun-33)”
e2“Plowing seedbed had significantly and positively affected the sunflower attributes and significantly (P > 0.001) out yielded the un-plowed seedbed by 22%”
Claim · model-written summary
Plowing the seedbed positively affected sunflower attributes compared with the un-plowed seedbed.
- Taxon
- sunflowerHelianthus annuuse2
- Treatment
- Plowing seedbede2
- Outcome
- sunflower attributese2
- Direction
- positively affectede2
- Qualifier
- P > 0.001e2
- Comparator
- un-plowed seedbede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field experiment was carried out during two consecutive rainy seasons (2008 and 2009) at Gedarif University Research Farm”
e2“Plowing seedbed had significantly and positively affected the sunflower attributes and significantly (P > 0.001) out yielded the un-plowed seedbed by 22%”
Claim · model-written summary
Preparing the seedbed with a wide level disk accelerated emergence and flowering of sunflower compared with un-plowed seedbed.
- Taxon
- sunflowerHelianthus annuuse3
- Treatment
- Preparing the seedbed by the wide level diske3
- Outcome
- emergence and floweringe3
- Direction
- acceleratee3
- Comparator
- un-plowede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Preparing the seedbed by the wide level disk accelerate the emergence and flowering of sunflower crop compared to un-plowed”
Claim · model-written summary
Seedbed preparation methods made no significant difference in soil moisture content.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- seedbed preparation methodse4
- Outcome
- soil moisture contente4
- Direction
- no significant differencee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“on the performance of a sunflower (Helianthus annuus L.) hybrid (Hysun-33)”
e4“But no significant difference in soil moisture content between seedbed preparation methods was detected”
Claim · model-written summary
Urea application had no effect on growth attributes and grain yield of sunflower.
- Taxon
- sunflowerHelianthus annuuse5
- Treatment
- urea applicatione5
- Outcome
- growth attributes and grain yielde5
- Direction
- no_changeinferrede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Neither urea application nor its interactions with seedbed preparation methods had an effect on all growth attributes and grain yield of sunflower”
Claim · model-written summary
Interactions of urea with seedbed preparation methods had no effect on growth attributes and grain yield of sunflower.
- Taxon
- sunflowerHelianthus annuuse5
- Treatment
- its interactions with seedbed preparation methodse5
- Outcome
- growth attributes and grain yielde5
- Direction
- no_changeinferrede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Neither urea application nor its interactions with seedbed preparation methods had an effect on all growth attributes and grain yield of sunflower”
Claim · model-written summary
Good seedbed preparation is necessary for improving sunflower production.
- Taxon
- sunflowerHelianthus annuuse6
- Outcome
- sunflower productione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“It can be concluded that good seedbed preparation is necessary for improving sunflower production”
The same questions in other papers
tillage · yield · Helianthus annuus (common sunflower)Positive and negative results
49 papers in the same direction as this paper · 16 in the opposite direction · 4 reporting no difference from an alternative
- no effect
- no effect
- negative
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See all 70 papers →nitrogen · yield · Helianthus annuus (common sunflower)Positive and negative results
13 papers in the same direction as this paper · 182 in the opposite direction
- positive
- positive
- positive
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See all 196 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.