Abstract
Fertilizer research trials were conducted in tomato fields in Central California to determine the impact of slow release fertilizer on fruit quality and yield of processing tomatoes. Quality parameters evaluated were soluble solids content, color of a blended juice sample and total yield. Tomato yield was affected by soil type, type of fertilizer and variety used. Soluble solids content was affected by the different environmental or growing conditions in which the trials were conducted. Level of soil nutrition, type of fertilizer and cultural management of the tomato crop seem to have played a significant role on fruit quality and production. Slow release nitrogen fertilizer in combination with a potassium source fertilizer had a significant effect increasing soluble solids content (°Brix) in one of the sites. Furthermore, the addition of potassium + humic acid increased soluble solids in marginal tomato fields (poor soil types with low levels of residual nutrients). Yield response was similar to °Brix increases. Small yield differences were observed in what is considered good soils (deep sandy loam-class 1 soils). Poor to marginal fields, however, responded better to both yield and soluble solids which could benefit from the use of slow release fertilizers and justify their higher price over conventional fertilizers.
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Claims 8
Claim · model-written summary
Tomato yield varied with soil type, fertilizer type and variety.
- Taxon
- Tomato
Solanum lycopersicume0 - Material
- varietye0
- Treatment
- type of fertilizere0
- Outcome
- Tomato yielde0
- Setting
- soil typee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato yield was affected by soil type, type of fertilizer and variety used.”
Claim · model-written summary
Growing conditions affected tomato soluble solids content.
Not reportedDirection
Verbatim
t0“PROCESSING TOMATOES”
e0“Soluble solids content was affected by the different environmental or growing conditions in which the trials were conducted.”
Claim · model-written summary
Slow release nitrogen fertilizer combined with potassium significantly increased tomato soluble solids at one site.
- Taxon
- TOMATOESt0
- Treatment
- Slow release nitrogen fertilizer in combination with a potassium source fertilizere0
- Outcome
- soluble solids content (°Brix)e0
- Direction
- increasinge0
- Qualifier
- in one of the sitese0
Not reportedComparator
Verbatim
t0“PROCESSING TOMATOES”
e0“Slow release nitrogen fertilizer in combination with a potassium source fertilizer had a significant effect increasing soluble solids content (°Brix) in one of the sites.”
Claim · model-written summary
Potassium and humic acid increased tomato soluble solids in marginal fields.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- potassium + humic acide0
- Outcome
- soluble solidse0
- Direction
- increasede0
- Qualifier
- poor soil types with low levels of residual nutrientse0
- Setting
- marginal tomato fieldse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PROCESSING TOMATOES”
e0“the addition of potassium + humic acid increased soluble solids in marginal tomato fields (poor soil types with low levels of residual nutrients)”
Claim · model-written summary
Tomato yield followed the soluble solids increases.
Verbatim
t0“PROCESSING TOMATOES”
e0“Yield response was similar to °Brix increases.”
Claim · model-written summary
Yield differences were small in good soils.
Verbatim
t0“PROCESSING TOMATOES”
e0“Small yield differences were observed in what is considered good soils (deep sandy loam-class 1 soils).”
Claim · model-written summary
Poor to marginal fields responded better in yield and soluble solids.
Verbatim
t0“PROCESSING TOMATOES”
e0“Poor to marginal fields, however, responded better to both yield and soluble solids”
Claim · model-written summary
The authors suggest slow release fertilizers may benefit poor to marginal tomato fields enough to justify their price.
Verbatim
t0“PROCESSING TOMATOES”
e0“Poor to marginal fields, however, responded better to both yield and soluble solids which could benefit from the use of slow release fertilizers and justify their higher price over conventional fertilizers.”
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other · quality: sugar starch · Solanum lycopersicum (tomato)Results differ
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- no effect
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128 papers in the same direction as this paper · 13 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- negative
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See all 144 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.