Abstract
Studies were conducted to determine the effect of N application frequency through drip irrigation on soil NO 3 -N movement in the bed profile and on yield and N uptake by tomato plants (Lycopersicon esculentum Mill. `Sunny') at two locations. Increasing N application frequency resulted in increased yields at Clayton, N. C., but not at Charleston, S.C. The number of fruit produced was not affected by N treatment at either location, but fruit size increased with increasing N application frequency at Clayton. Foliage N concentration decreased seasonally, but neither foliage N concentration nor total N content of the above-ground portion of the plants was affected by N application frequency. Regardless of N application frequency, NO 3 -N concentrations within the raised bed decreased with time due to plant uptake and leaching. Nitrogen levels declined most rapidly in the area closest to the drip tube.
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Claims 9
Claim · model-written summary
More frequent nitrogen application increased yield at Clayton.
- Taxon
- tomato plants
Solanum lycopersicume7 - Treatment
- Increasing N application frequencye0
- Outcome
- yieldse0
- Direction
- increasede0
- Setting
- Clayton, N. C.e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing N application frequency resulted in increased yields at Clayton, N. C., but not at Charleston, S.C.”
e7“tomato plants (Lycopersicon esculentum Mill. `Sunny')”
Claim · model-written summary
Nitrogen application frequency did not increase yield at Charleston.
- Taxon
- tomato plantsSolanum lycopersicume7
- Treatment
- Increasing N application frequencye0
- Outcome
- yieldse0
- Setting
- Charleston, S.C.e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing N application frequency resulted in increased yields at Clayton, N. C., but not at Charleston, S.C.”
e7“tomato plants (Lycopersicon esculentum Mill. `Sunny')”
Claim · model-written summary
Nitrogen treatment did not affect fruit number at either location.
- Taxon
- tomato plantsSolanum lycopersicume7
- Treatment
- N treatmente0
- Outcome
- number of fruit producede0
- Direction
- not affectede0
- Setting
- either locatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of fruit produced was not affected by N treatment at either location”
e7“tomato plants (Lycopersicon esculentum Mill. `Sunny')”
Claim · model-written summary
Increasing nitrogen application frequency increased fruit size at Clayton.
- Taxon
- tomato plantsSolanum lycopersicume7
- Treatment
- increasing N application frequencye0
- Outcome
- fruit sizee0
- Direction
- increasede0
- Setting
- Claytone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fruit size increased with increasing N application frequency at Clayton.”
e7“tomato plants (Lycopersicon esculentum Mill. `Sunny')”
Claim · model-written summary
Foliage nitrogen concentration declined seasonally.
- Taxon
- tomato plantsSolanum lycopersicume7
- Outcome
- Foliage N concentratione0
- Direction
- decreasede0
- Qualifier
- seasonallye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliage N concentration decreased seasonally”
e7“tomato plants (Lycopersicon esculentum Mill. `Sunny')”
Claim · model-written summary
Nitrogen frequency did not affect foliage nitrogen concentration.
- Taxon
- tomato plantsSolanum lycopersicume7
- Treatment
- N application frequencye0
- Outcome
- foliage N concentratione0
- Direction
- nor total N content of the above-ground portion of the plants was affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“neither foliage N concentration nor total N content of the above-ground portion of the plants was affected by N application frequency.”
e7“tomato plants (Lycopersicon esculentum Mill. `Sunny')”
Claim · model-written summary
Nitrogen frequency did not affect aboveground total nitrogen content.
- Taxon
- tomato plantsSolanum lycopersicume7
- Treatment
- N application frequencye0
- Outcome
- total N content of the above-ground portion of the plantse0
- Direction
- was affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“neither foliage N concentration nor total N content of the above-ground portion of the plants was affected by N application frequency.”
e7“tomato plants (Lycopersicon esculentum Mill. `Sunny')”
Claim · model-written summary
Raised-bed nitrate concentration declined over time regardless of nitrogen application frequency.
- Outcome
- NO 3 -N concentrations within the raised bede0
- Direction
- decreasede0
- Qualifier
- Regardless of N application frequencye0
Not reportedTaxon
Verbatim
e0“Regardless of N application frequency, NO 3 -N concentrations within the raised bed decreased with time due to plant uptake and leaching.”
e7“tomato plants (Lycopersicon esculentum Mill. `Sunny')”
Claim · model-written summary
Nitrogen declined fastest near the drip tube.
Not reportedTaxon
Verbatim
e0“Nitrogen levels declined most rapidly in the area closest to the drip tube.”
e7“tomato plants (Lycopersicon esculentum Mill. `Sunny')”
The same questions in other papers
nitrogen · nutrient: content · Solanum lycopersicum (tomato)Results differ
17 papers in the same direction as this paper · 59 in the opposite direction
- positive
- positive
- positive
73 papers more in this group
See all 77 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
- positive
- negative
- negative
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.