Abstract
A survey of 140 processing tomato ( Lycopersicon esculentum Mill.) fields in central California was conducted in 1996-97 to examine the relationship between K nutrition and fruit quality for processing. Quality parameters evaluated were soluble solids (SS), pH, color of a blended juice sample, and the percent of fruit affected by the color disorders yellow shoulder (YS) or internal white tissue (IWT). Juice color and pH were not correlated with soil K availability or plant K status. SS was correlated with both soil exchangeable K and midseason leaf K concentration ( r = 0.25 and 0.28, p < 0.01) but the regression relationships suggested that the impact of soil or plant K status on fruit SS was minor. YS and IWT incidence, which varied among fields from 0% to 68% of fruit affected, was negatively correlated with K status of both soil and plant. Soil exchangeable K/√Mg ratio was the measure of soil K availability most closely correlated with percent total color disorders (YS + IWT, r = -0.45, p < 0.01). In field trials conducted to document the relationship between soil K availability and the fruit color disorders, soil application of either K or gypsum (CaSO 4 , to increase K/√Mg ratio) reduced YS and total color disorders. Multiple foliar K applications were effective in reducing fruit color disorders at only one of two sites. In no field trial did K application improve yield, SS, or juice color.
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Claims 10
Claim · model-written summary
Juice color and pH were uncorrelated with soil K availability or plant K status.
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“Juice color and pH were not correlated with soil K availability or plant K status”
Claim · model-written summary
Soluble solids correlated with soil exchangeable K, although the inferred impact was minor.
Not reportedDirection
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“SS was correlated with both soil exchangeable K and midseason leaf K concentration ( r = 0.25 and 0.28, p < 0.01) but the regression relationships suggested that the impact of soil or plant K status on fruit SS was minor”
Claim · model-written summary
Soluble solids correlated with midseason leaf K concentration, but the inferred impact was minor.
- Taxon
- processing tomatoe0
- Compound
- midseason leaf K concentratione1
- Outcome
- SSe1
- Value
- 0.28e1
- Qualifier
- minore1
Not reportedDirection
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“SS was correlated with both soil exchangeable K and midseason leaf K concentration ( r = 0.25 and 0.28, p < 0.01) but the regression relationships suggested that the impact of soil or plant K status on fruit SS was minor”
Claim · model-written summary
Yellow shoulder and internal white tissue incidence varied from 0% to 68% among fields.
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“YS and IWT incidence, which varied among fields from 0% to 68% of fruit affected”
Claim · model-written summary
Yellow shoulder and internal white tissue incidence were negatively correlated with soil and plant potassium status.
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“YS and IWT incidence, which varied among fields from 0% to 68% of fruit affected, was negatively correlated with K status of both soil and plant”
Claim · model-written summary
The soil exchangeable K/√Mg ratio was the soil K measure most closely correlated with total color disorders.
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“Soil exchangeable K/√Mg ratio was the measure of soil K availability most closely correlated with percent total color disorders (YS + IWT, r = -0.45, p < 0.01)”
Claim · model-written summary
Soil K application reduced yellow shoulder and total color disorders.
- Taxon
- processing tomatoe0
- Treatment
- soil application of either Ke1
- Outcome
- YS and total color disorderse1
- Direction
- reducede1
Not reportedComparator
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“soil application of either K or gypsum (CaSO 4 , to increase K/√Mg ratio) reduced YS and total color disorders”
Claim · model-written summary
Gypsum soil application reduced yellow shoulder and total color disorders.
Not reportedComparator
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“soil application of either K or gypsum (CaSO 4 , to increase K/√Mg ratio) reduced YS and total color disorders”
Claim · model-written summary
Multiple foliar K applications reduced fruit color disorders at only one of two sites.
- Taxon
- processing tomatoe0
- Treatment
- Multiple foliar K applicationse1
- Outcome
- fruit color disorderse1
- Direction
- reducinge1
- Qualifier
- only one of two sitese1
Not reportedComparator
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“Multiple foliar K applications were effective in reducing fruit color disorders at only one of two sites”
Claim · model-written summary
K application did not improve yield, soluble solids, or juice color in any field trial.
- Taxon
- processing tomatoe0
- Treatment
- K applicatione1
- Outcome
- yield, SS, or juice colore1
- Direction
- no field trial did K application improvee1
Not reportedComparator
Verbatim
e0“processing tomato ( Lycopersicon esculentum Mill.) fields in central California”
e1“In no field trial did K application improve yield, SS, or juice color”
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