Abstract
Two tomato (Lycopersicon esculentum Mill.) cultivars, Mtn. Spring and Jet Star, were grown on black polyethylene-mulched beds of a loam soil with an organic matter content of 2.4% for two seasons, 1996 and 1997, to evaluate preplant N rate effects on fruit yield and leaf blade total nitrogen (N) and petiole sap NO3-N concentration. Four rates of N fertilizer (0 to 136 kg ha−1), as urea, were rotovated into the bed prior to laying the plastic mulch. Samples of the most recently matured leaves were taken every two weeks for N and NO3-N content. Fruit yield and quality were associated with early season, 4 and 6 week, petiole sap NO3-N concentration. Mtn. Spring required 1050 ppm sap NO3-N compared with 900 ppm for the Jet Star cultivar. In 1996, Mtn. Spring achieved maximum yield at 31 kg N ha−1 whereas Jet Star required 67 kg N ha−1. Maximum yield occurred at 67 kg N ha−1 for both cultivars in 1997. Nitrogen rates above the optimum decreased early yields in 1996, but not in 1997. Soil N mineralization data showed > 112 kg N ha−1 by mid-July in the top 30 cm of the soil profile. On the prairie soils of the upper Midwest soil N management should be similar for both determinate and indeterminate fresh market tomatoes.
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Claims 9
Claim · model-written summary
Fruit yield and quality were associated with petiole sap nitrate concentrations at four and six weeks.
- Taxon
- tomato
Solanum lycopersicumt0 - Compound
- petiole sap NO3-N concentratione0
- Outcome
- Fruit yield and qualitye0
- Qualifier
- early season, 4 and 6 weeke0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit yield and quality were associated with early season, 4 and 6 week, petiole sap NO3-N concentration.”
t0“TOMATO”
Claim · model-written summary
Mtn. Spring required 1050 ppm sap nitrate, compared with 900 ppm for Jet Star.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Mtn. Springe0
- Outcome
- sap NO3-Ne0
- Direction
- requirede0
- Value
- 1050 ppme0
- Qualifier
- 900 ppme0
- Comparator
- Jet Star cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mtn. Spring required 1050 ppm sap NO3-N compared with 900 ppm for the Jet Star cultivar.”
t0“TOMATO”
Claim · model-written summary
Mtn. Spring reached maximum yield at 31 kg N ha−1 in 1996.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Mtn. Springe0
- Treatment
- 31 kg N ha−1e0
- Outcome
- maximum yielde0
- Direction
- maximume0
- Value
- 31 kg N ha−1e0
- Qualifier
- In 1996e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1996, Mtn. Spring achieved maximum yield at 31 kg N ha−1 whereas Jet Star required 67 kg N ha−1.”
t0“TOMATO”
Claim · model-written summary
Jet Star required 67 kg N ha−1 for maximum yield in 1996.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Jet Stare0
- Treatment
- 67 kg N ha−1e0
- Outcome
- maximum yielde0
- Direction
- maximume0
- Value
- 67 kg N ha−1e0
- Qualifier
- In 1996e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1996, Mtn. Spring achieved maximum yield at 31 kg N ha−1 whereas Jet Star required 67 kg N ha−1.”
t0“TOMATO”
Claim · model-written summary
Both cultivars reached maximum yield at 67 kg N ha−1 in 1997.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 67 kg N ha−1e0
- Outcome
- Maximum yielde0
- Direction
- Maximume0
- Value
- 67 kg N ha−1e0
- Qualifier
- both cultivars in 1997e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum yield occurred at 67 kg N ha−1 for both cultivars in 1997.”
t0“TOMATO”
Claim · model-written summary
Nitrogen rates above the optimum decreased early tomato yields in 1996.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Nitrogen rates above the optimume0
- Outcome
- early yieldse0
- Direction
- decreasede0
- Qualifier
- in 1996e0
- Comparator
- the optimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen rates above the optimum decreased early yields in 1996, but not in 1997.”
t0“TOMATO”
Claim · model-written summary
Nitrogen rates above the optimum did not decrease early tomato yields in 1997.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Nitrogen rates above the optimume0
- Outcome
- early yieldse0
- Direction
- not in 1997e0
- Qualifier
- in 1997e0
- Comparator
- the optimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen rates above the optimum decreased early yields in 1996, but not in 1997.”
t0“TOMATO”
Claim · model-written summary
Soil nitrogen mineralization exceeded 112 kg N ha−1 by mid-July in the top 30 cm.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- Soil N mineralizatione0
- Value
- > 112 kg N ha−1e0
- Qualifier
- by mid-July in the top 30 cm of the soil profilee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil N mineralization data showed > 112 kg N ha−1 by mid-July in the top 30 cm of the soil profile.”
t0“TOMATO”
Claim · model-written summary
The authors recommend similar soil nitrogen management for determinate and indeterminate fresh market tomatoes on upper Midwest prairie soils.
- Taxon
- tomatoesSolanum lycopersicume0
- Outcome
- soil N management should be similare0
- Qualifier
- both determinate and indeterminate fresh market tomatoese0
- Setting
- prairie soils of the upper Midweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the prairie soils of the upper Midwest soil N management should be similar for both determinate and indeterminate fresh market tomatoes.”
The same questions in other papers
nitrogen · yield · Solanum lycopersicum (tomato)Positive and negative results
171 papers in the same direction as this paper · 31 in the opposite direction · 7 reporting no difference from an alternative
- no effect
- positive
- positive
206 papers more in this group
See all 210 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.