Abstract
Abstract Soluble fertilisers applied at rates commonly used in commercial tomato glass‐houses can cause root injury which may result in obvious external symptoms or which may be reflected only in reduced or delayed yields or difficulty in fruit setting. Although the rates of application may be safe initially, accumulation of ammonium salts or of soluble salts in general may reach damaging levels for one or more of several reasons. In a trial with varied rates of soluble fertiliser feeding, yield was highest with lowest fertiliser application rates, while root rot and corkiness were greatest with highest rates. In an investigation of the relation of ammonium accumulation to root injury, it was found that vegetative growth and early yields were reduced in plots where ammonium accumulation occurred due to lack of nitrification in fumigated soils fertilised with urea. Root rot and corkiness were markedly more severe in these fumigated plots than III non‐fumigated check plots. Root symptoms were similar to those shown elsewhere to be due to fungus attack. Thus in the root rot complex, a common set of symptoms may result from several different causes acting alone or in combination.
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Claims 9
Claim · model-written summary
Yield was highest at the lowest soluble-fertilizer application rates.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Treatment
- lowest fertiliser application ratese0
- Outcome
- yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield was highest with lowest fertiliser application rates”
t0“tomato plants”
Claim · model-written summary
Root rot was greatest at the highest fertilizer rates.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- highest ratese0
- Outcome
- root rote0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root rot and corkiness were greatest with highest rates”
t0“tomato plants”
Claim · model-written summary
Root corkiness was greatest at the highest fertilizer rates.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- highest ratese0
- Outcome
- corkinesse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root rot and corkiness were greatest with highest rates”
t0“tomato plants”
Claim · model-written summary
Ammonium accumulation in fumigated, urea-fertilized soil reduced vegetative growth.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- fumigated soils fertilised with ureae0
- Compound
- ammoniume0
- Outcome
- vegetative growthe0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“vegetative growth and early yields were reduced in plots where ammonium accumulation occurred due to lack of nitrification in fumigated soils fertilised with urea”
t0“tomato plants”
Claim · model-written summary
Ammonium accumulation in fumigated, urea-fertilized soil reduced early yields.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- fumigated soils fertilised with ureae0
- Compound
- ammoniume0
- Outcome
- early yieldse0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“vegetative growth and early yields were reduced in plots where ammonium accumulation occurred due to lack of nitrification in fumigated soils fertilised with urea”
t0“tomato plants”
Claim · model-written summary
Fumigated plots had more severe root rot than non-fumigated checks.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- fumigated plotse0
- Outcome
- Root rote0
- Direction
- more severee0
- Comparator
- non‐fumigated check plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root rot and corkiness were markedly more severe in these fumigated plots than III non‐fumigated check plots.”
t0“tomato plants”
Claim · model-written summary
Fumigated plots had more severe root corkiness than non-fumigated checks.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- fumigated plotse0
- Outcome
- corkinesse0
- Direction
- more severee0
- Comparator
- non‐fumigated check plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root rot and corkiness were markedly more severe in these fumigated plots than III non‐fumigated check plots.”
t0“tomato plants”
Claim · model-written summary
The observed root symptoms resembled symptoms attributed elsewhere to fungal attack.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Outcome
- Root symptomse0
- Comparator
- those shown elsewhere to be due to fungus attacke0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root symptoms were similar to those shown elsewhere to be due to fungus attack.”
t0“tomato plants”
Claim · model-written summary
The authors infer that several causes, separately or together, can produce the root-rot symptom complex.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Outcome
- common set of symptomse0
- Qualifier
- several different causes acting alone or in combinatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a common set of symptoms may result from several different causes acting alone or in combination”
t0“tomato plants”
The same questions in other papers
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849 papers in the same direction as this paper · 104 in the opposite direction · 24 reporting no difference from an alternative
- no effect
- negative
- negative
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See all 978 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.