Abstract
`Bluecrop' highbush blueberries (Vaccinium corymbosum L.) received various N fertilizer treatments for 5 years. Treatments were evaluated by measuring berry yields and leaf N levels annually and bush size after 5 years. Nitrogen fertilizers increased yields and leaf N levels compared with nonfertilized controls. Split applications of urea (half applied at budbreak, half at petal fall) resulted in 10% higher yields than the same amount in a single application at budbreak. Urea and two controlled-release fertilizers (CRF) with different dissolution rates (3 to 4 months, 8 to 9 months) resulted in similar yields and leaf N levels when compared at the same rate of N. The dissolution rate of the CRF materials did not affect yields or leaf N levels.
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Claims 4
Claim · model-written summary
Nitrogen fertilizers increased yields and leaf N levels of highbush blueberry compared with nonfertilized controls.
- Taxon
- highbush blueberries
Vaccinium corymbosume0 - Treatment
- Nitrogen fertilizerse1
- Outcome
- yields and leaf N levelse1
- Direction
- increasede1
- Comparator
- nonfertilized controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highbush blueberries”
e1“Nitrogen fertilizers increased yields and leaf N levels compared with nonfertilized controls”
Claim · model-written summary
Split applications of urea (half at budbreak, half at petal fall) gave 10% higher yields than the same amount applied once at budbreak.
- Taxon
- highbush blueberriesVaccinium corymbosume0
- Treatment
- Split applications of urea (half applied at budbreak, half at petal fall)e1
- Outcome
- yieldse1
- Direction
- highere1
- Value
- 10%e1
- Comparator
- the same amount in a single application at budbreake1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highbush blueberries”
e1“Split applications of urea (half applied at budbreak, half at petal fall) resulted in 10% higher yields than the same amount in a single application at budbreak”
Claim · model-written summary
Urea and two controlled-release fertilizers with different dissolution rates gave similar yields and leaf N levels at the same N rate.
- Taxon
- highbush blueberriesVaccinium corymbosume0
- Treatment
- Ureae1
- Outcome
- yields and leaf N levelse1
- Direction
- similare1
- Comparator
- two controlled-release fertilizers (CRF) with different dissolution ratese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highbush blueberries”
e1“Urea and two controlled-release fertilizers (CRF) with different dissolution rates (3 to 4 months, 8 to 9 months) resulted in similar yields and leaf N levels when compared at the same rate of N”
Claim · model-written summary
The dissolution rate of the controlled-release fertilizer materials did not affect blueberry yields or leaf N levels.
- Taxon
- highbush blueberriesVaccinium corymbosume0
- Treatment
- dissolution rate of the CRF materialse1
- Outcome
- yields or leaf N levelse1
- Direction
- did not affecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highbush blueberries”
e1“The dissolution rate of the CRF materials did not affect yields or leaf N levels”
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See all 24 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.