Abstract
Winter rapeseed ( Brassica napus L.) has potential to become an alternate oilseed crop both for edible oil production and energy agriculture (biofuel production) for Turkey. This study was conducted to determine the effect of year, N sources and doses on the yield and quality traits of winter rapeseed in a cereal system in calcareous soils over two seasons, 2000-2001 and 2001-2002, in Central Anatolia. Three N sources, ammonium sulfate, ammonium nitrate and urea, were applied as hand broadcast on the soil surface at five doses (0, 50, 100, 150, and 200 kg N ha-1). The traits investigated were plant height, number of branches and pods per plant, number of seed per pod, thousand seed weight, seed yield, oil and protein content. There were significantly effects on seed yield, oil and protein content, and other yield components due to N sources and rates. In general, ammonium sulfate and urea gave higher seed yield than ammonium nitrate. Mean values of both seasons indicated that 100 and 150 kg N ha-1 rate increased significantly yield and quality traits with regard to other N treatments. The present results highlight the practical importance of adequate N fertilization and true N source in seed yield in winter rapeseed and suggest that ammonium sulfate at 150 kg N ha-1 will be about adequate to meet crop N requirements.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
N source and rate significantly affected seed yield, oil and protein content and other yield components of winter rapeseed.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Treatment
- N sources and ratese2
- Outcome
- seed yield, oil and protein contente2
- Setting
- Central Anatoliae1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“Winter rapeseed ( Brassica napus L.) has potential to become an alternate oilseed crop”
e1“in Central Anatolia”
e2“There were significantly effects on seed yield, oil and protein content, and other yield components due to N sources and rates”
Claim · model-written summary
Ammonium sulfate and urea gave higher seed yield of winter rapeseed than ammonium nitrate.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- ammonium sulfate and ureae3
- Outcome
- seed yielde3
- Direction
- highere3
- Comparator
- ammonium nitratee3
- Setting
- Central Anatoliae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter rapeseed ( Brassica napus L.) has potential to become an alternate oilseed crop”
e1“in Central Anatolia”
e3“ammonium sulfate and urea gave higher seed yield than ammonium nitrate”
Claim · model-written summary
The 100 and 150 kg N ha-1 rates significantly increased yield and quality traits of winter rapeseed relative to other N treatments.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- 100 and 150 kg N ha-1e4
- Outcome
- yield and quality traitse4
- Direction
- increasede4
- Comparator
- other N treatmentse4
- Setting
- Central Anatoliae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter rapeseed ( Brassica napus L.) has potential to become an alternate oilseed crop”
e1“in Central Anatolia”
e4“100 and 150 kg N ha-1 rate increased significantly yield and quality traits with regard to other N treatments”
Claim · model-written summary
The authors suggest ammonium sulfate at 150 kg N ha-1 is about adequate to meet the crop N requirements of winter rapeseed.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- ammonium sulfate at 150 kg N ha-1e5
- Outcome
- meet crop N requirementse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter rapeseed ( Brassica napus L.) has potential to become an alternate oilseed crop”
e5“ammonium sulfate at 150 kg N ha-1 will be about adequate to meet crop N requirements”
The same questions in other papers
ammonium sulfate · yield · Brassica napus (oilseed rape)Results differ
6 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- no effect
7 papers more in this group
See all 11 papers →nitrogen · yield · Brassica napus (oilseed rape)Positive and negative results
197 papers in the same direction as this paper · 34 in the opposite direction · 7 reporting no difference from an alternative
- negative
- negative
- negative
235 papers more in this group
See all 239 papers →nitrogen · quality: general · Brassica napus (oilseed rape)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.