Abstract
Abstract Thirty‐four field experiments were carried out on the seedbed fertilizer requirements of winter oilseed rape in the main rape‐growing areas of England and Scotland. Average seed yield was increased by seedbed N from 2.711 ha −1 to 2.881 ha −1 (when 200 kg ha −1 N was given in spring). Economic analysis showed 60 kg ha −1 as likely to be the most profitable rate of seedbed N for most situations. P fertilizer increased yield significantly on soils with low or moderate levels of available soil P but there was little response to K fertilizer on soils of high or medium K status and too few experiments on low K status soils to quantify requirements thereon. S application to the seedbed (as calcium sulphate) did not increase yield. Seedbed N decreased seed oil content slightly and not always significantly while P, K and S had no effect. Nutrient removal in the seed of an average 3 t ha −1 crop would be 90 kg ha −1 of N, 17 kg ha −1 of P (40 kg ha −1 P 2 O 5 ) and 17 kg ha −1 of K (20 kg ha −1 K 2 O).
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 10
Claim · model-written summary
Seedbed N raised average seed yield of winter oilseed rape from 2.711 to 2.881 ha −1 when 200 kg ha −1 N was given in spring.
- Taxon
- winter oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- seedbed Ne0
- Outcome
- Average seed yielde0
- Direction
- increasede0
- Value
- from 2.711 ha −1 to 2.881 ha −1e0
- Qualifier
- when 200 kg ha −1 N was given in springe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“winter oilseed rape”
e0“Average seed yield was increased by seedbed N from 2.711 ha −1 to 2.881 ha −1 (when 200 kg ha −1 N was given in spring)”
Claim · model-written summary
Economic analysis indicated 60 kg ha −1 as likely the most profitable seedbed N rate for most situations in winter oilseed rape.
- Taxon
- winter oilseed rapeBrassica napust0
- Outcome
- most profitable rate of seedbed Ne0
- Value
- 60 kg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“Economic analysis showed 60 kg ha −1 as likely to be the most profitable rate of seedbed N for most situations”
Claim · model-written summary
P fertilizer increased yield significantly on soils with low or moderate available soil P.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- P fertilizere0
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- on soils with low or moderate levels of available soil Pe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“P fertilizer increased yield significantly on soils with low or moderate levels of available soil P”
Claim · model-written summary
There was little response in yield to K fertilizer on soils of high or medium K status.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- K fertilizere0
- Outcome
- responsee0
- Direction
- little responsee0
- Qualifier
- soils of high or medium K statuse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“there was little response to K fertilizer on soils of high or medium K status”
Claim · model-written summary
S applied to the seedbed as calcium sulphate did not increase yield.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- S application to the seedbed (as calcium sulphate)e0
- Outcome
- yielde0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“S application to the seedbed (as calcium sulphate) did not increase yield”
Claim · model-written summary
Seedbed N decreased seed oil content slightly, not always significantly.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- Seedbed Ne0
- Outcome
- seed oil contente0
- Direction
- decreasede0
- Qualifier
- slightly and not always significantlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“Seedbed N decreased seed oil content slightly and not always significantly”
Claim · model-written summary
Seedbed P, K and S had no effect on seed oil content.
- Taxon
- winter oilseed rapeBrassica napust0
- Treatment
- P, K and Se0
- Outcome
- seed oil contente0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“Seedbed N decreased seed oil content slightly and not always significantly while P, K and S had no effect”
Claim · model-written summary
Nutrient removal in the seed of an average 3 t ha −1 crop would be 90 kg ha −1 of N.
- Taxon
- winter oilseed rapeBrassica napust0
- Outcome
- Nutrient removal in the seede0
- Value
- 90 kg ha −1e0
- Qualifier
- average 3 t ha −1 crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“Nutrient removal in the seed of an average 3 t ha −1 crop would be 90 kg ha −1 of N”
Claim · model-written summary
Nutrient removal of P in the seed of an average 3 t ha −1 crop would be 17 kg ha −1 (40 kg ha −1 P 2 O 5).
- Taxon
- winter oilseed rapeBrassica napust0
- Outcome
- Nutrient removal in the seede0
- Value
- 17 kg ha −1e0
- Qualifier
- average 3 t ha −1 crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“Nutrient removal in the seed of an average 3 t ha −1 crop would be 90 kg ha −1 of N, 17 kg ha −1 of P (40 kg ha −1 P 2 O 5 )”
Claim · model-written summary
Nutrient removal of K in the seed of an average 3 t ha −1 crop would be 17 kg ha −1 (20 kg ha −1 K 2 O).
- Taxon
- winter oilseed rapeBrassica napust0
- Outcome
- Nutrient removal in the seede0
- Value
- 17 kg ha −1e0
- Qualifier
- average 3 t ha −1 crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e0“Nutrient removal in the seed of an average 3 t ha −1 crop would be 90 kg ha −1 of N, 17 kg ha −1 of P (40 kg ha −1 P 2 O 5 ) and 17 kg ha −1 of K (20 kg ha −1 K 2 O)”
The same questions in other papers
sulfur atom · yield · Brassica napus (oilseed rape)Results differ
9 papers in the same direction as this paper · 49 in the opposite direction
- no effect
- positive
- positive
55 papers more in this group
See all 59 papers →potassium · quality: oil · Brassica napus (oilseed rape)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →phosphorus · quality: oil · Brassica napus (oilseed rape)Positive and negative results
4 papers in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 papers →fertilization · yield · Brassica napus (oilseed rape)Positive and negative results
336 papers in the same direction as this paper · 37 in the opposite direction · 4 reporting no difference from an alternative
- no effect
- positive
- positive
374 papers more in this group
See all 378 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.