Abstract
Abstract A field trial showed that strawberries do not need large quantities of N and that N applied in spring had the biggest influence on yield. Plants receiving spring N yielded 43.1 t ha‐1 compared with 26.0 t ha‐1 by plants not receiving spring N. Although N applied in autumn did not influence yield to a marked extent, it caused a shift in production peaks. Plants that had received autumn N produced an early crop, while plants receiving no autumn N showed a delayed production peak. Highest yields were obtained with 36.5 kg N ha‐1 in the spring, and 36.5 kg N ha‐1 in autumn in split applications. For optimum yields, N should be applied from mid‐winter in small, regular amounts. Although yield was not greatly affected by K applications, it is essential to keep the soil K content at about 40 ppm Bray II extractable K in order to obtain better fruit size.
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Claims 9
Claim · model-written summary
Spring nitrogen raised strawberry yield to 43.1 t ha‐1 versus 26.0 t ha‐1 without spring nitrogen.
- Taxon
- strawberries
_single2.jpg?width=60)
Fragaria ×ananassat0 - Treatment
- spring Ne0
- Outcome
- yieldede0
- Direction
- yieldede0
- Value
- 43.1 t ha‐1e0
- Qualifier
- 26.0 t ha‐1e0
- Comparator
- plants not receiving spring Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“Plants receiving spring N yielded 43.1 t ha‐1 compared with 26.0 t ha‐1 by plants not receiving spring N.”
t0“strawberries”
Claim · model-written summary
Autumn nitrogen did not markedly affect yield.
- Taxon
- strawberriesFragaria ×ananassat0
- Treatment
- N applied in autumne0
- Outcome
- yielde0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although N applied in autumn did not influence yield to a marked extent”
t0“strawberries”
Claim · model-written summary
Autumn nitrogen shifted production peaks.
- Taxon
- strawberriesFragaria ×ananassat0
- Treatment
- N applied in autumne0
- Outcome
- production peakse0
- Direction
- shifte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although N applied in autumn did not influence yield to a marked extent, it caused a shift in production peaks.”
t0“strawberries”
Claim · model-written summary
Autumn nitrogen produced an early crop.
- Taxon
- strawberriesFragaria ×ananassat0
- Treatment
- autumn Ne0
- Outcome
- early crope0
- Comparator
- plants receiving no autumn Ne0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants that had received autumn N produced an early crop, while plants receiving no autumn N showed a delayed production peak.”
t0“strawberries”
Claim · model-written summary
Without autumn nitrogen the production peak was delayed.
- Taxon
- strawberriesFragaria ×ananassat0
- Treatment
- no autumn Ne0
- Outcome
- production peake0
- Direction
- delayede0
- Comparator
- autumn Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants that had received autumn N produced an early crop, while plants receiving no autumn N showed a delayed production peak.”
t0“strawberries”
Claim · model-written summary
The highest yields came from 36.5 kg N ha‐1 in spring and autumn split applications.
- Taxon
- strawberriesFragaria ×ananassat0
- Treatment
- 36.5 kg N ha‐1 in the spring, and 36.5 kg N ha‐1 in autumn in split applicationse0
- Outcome
- yieldse0
- Direction
- Higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest yields were obtained with 36.5 kg N ha‐1 in the spring, and 36.5 kg N ha‐1 in autumn in split applications.”
t0“strawberries”
Claim · model-written summary
Potassium applications did not greatly affect yield.
- Taxon
- strawberriesFragaria ×ananassat0
- Treatment
- K applicationse0
- Outcome
- yielde0
- Direction
- not greatly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although yield was not greatly affected by K applications”
t0“strawberries”
Claim · model-written summary
The authors recommend small regular nitrogen applications from midwinter for optimum yield.
- Taxon
- strawberriesFragaria ×ananassat0
- Outcome
- N should be applied from mid‐winter in small, regular amounts.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For optimum yields, N should be applied from mid‐winter in small, regular amounts.”
t0“strawberries”
Claim · model-written summary
The authors recommend about 40 ppm Bray II extractable soil potassium for better fruit size.
- Taxon
- strawberriesFragaria ×ananassat0
- Outcome
- keep the soil K content at about 40 ppm Bray II extractable Ke0
- Value
- 40 ppm Bray II extractable Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is essential to keep the soil K content at about 40 ppm Bray II extractable K in order to obtain better fruit size.”
t0“strawberries”
The same questions in other papers
nitrogen · yield · Fragaria x ananassa (strawberry)Results differ
47 papers in the same direction as this paper · 12 in the opposite direction
- no effect
- positive
- positive
56 papers more in this group
See all 60 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.