Abstract
Abstract Field experiments were conducted during the spring and fall of 1994 to evaluate two nitrogen (N) sources [ammonium nitrate (AN) and polymer‐coated urea (PCU)] and five levels of drip‐ or band‐applied N on the yield of drip irrigated ‘Solar Set’ tomatoes (Lycopersicon esculentum Mill). Early‐season yields obtained with PCU were similar to or greater than yields obtained with AN. Highest yields of large fruit early in the season were produced with 100% preplant‐applied AN or 100% band‐applied PCU. Total‐season yields were greater with AN than PCU and were not affected by placement of N. Increasing the percentage of drip‐ or band‐applied N resulted in leaf N concentrations that were inconsistent with trends in marketable fruit production; however, trends in leaf K concentration early in the season were similar to those of early‐season large fruit yields.
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Claims 7
Claim · model-written summary
Early season yields with PCU were similar to or greater than those with AN.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- PCUe0
- Outcome
- Early‐season yieldse0
- Direction
- similar to or greater thane0
- Comparator
- ANe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early‐season yields obtained with PCU were similar to or greater than yields obtained with AN.”
t0“Tomato fruit yield”
Claim · model-written summary
The highest early season large fruit yields came from all preplant applied AN.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 100% preplant‐applied ANe0
- Outcome
- yields of large fruit early in the seasone0
- Direction
- Higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest yields of large fruit early in the season were produced with 100% preplant‐applied AN or 100% band‐applied PCU.”
t0“Tomato fruit yield”
Claim · model-written summary
The highest early season large fruit yields came from all band applied PCU.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 100% band‐applied PCUe0
- Outcome
- yields of large fruit early in the seasone0
- Direction
- Higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest yields of large fruit early in the season were produced with 100% preplant‐applied AN or 100% band‐applied PCU.”
t0“Tomato fruit yield”
Claim · model-written summary
Total season yields were greater with AN than PCU.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- ANe0
- Outcome
- Total‐season yieldse0
- Direction
- greatere0
- Comparator
- PCUe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total‐season yields were greater with AN than PCU”
t0“Tomato fruit yield”
Claim · model-written summary
Nitrogen placement did not affect total season yield.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- placement of Ne0
- Outcome
- Total‐season yieldse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total‐season yields were greater with AN than PCU and were not affected by placement of N.”
t0“Tomato fruit yield”
Claim · model-written summary
Leaf nitrogen trends with increasing drip or band applied nitrogen were inconsistent with marketable fruit production.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Increasing the percentage of drip‐ or band‐applied Ne0
- Outcome
- leaf N concentrationse0
- Qualifier
- inconsistent with trends in marketable fruit productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the percentage of drip‐ or band‐applied N resulted in leaf N concentrations that were inconsistent with trends in marketable fruit production”
t0“Tomato fruit yield”
Claim · model-written summary
Early season leaf potassium trends resembled early season large fruit yield trends.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- leaf K concentratione0
- Comparator
- early‐season large fruit yieldse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“trends in leaf K concentration early in the season were similar to those of early‐season large fruit yields.”
t0“Tomato fruit yield”
The same questions in other papers
ammonium nitrate · yield · Solanum lycopersicum (tomato)Positive and negative results
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- positive
- negative
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See all 5 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.