Abstract
Abstract A study was conducted to determine the effect of previous crop, nitrogen (N) rate and planting density on N uptake within different vegetable cropping sequences. Spring crops included tomato (Lycopersicon esculentum Mill.), snap bean (Phaseolus vulgaris L.) and sweet corn (Zea mays L.). Each spring crop was followed in the fall by broccoli (Brassica olerácea L. Italica group), collard (Brassica oleracea L. Acephala group) and pumpkin (Cucurbita pepo L.). Higher N rates resulted in greater N uptake for all plants at some point in the growing season. Final N accumulation exceeded N fertilizer applied at 1 or more N rates for all six crops. However, higher N rates resulted in greater final N accumulation only with the tomato/broccoli sequence. Plants grown at lower density generally had greater N accumulation per plant, but N uptake per hectare was greater for the high density planting. The greatest previous crop effect was in 1984 when N accumulation for pumpkin following tomato exceeded that of other sequences. Cultural practices probably led to these differences.
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Claims 16
Claim · model-written summary
Higher nitrogen rates increased tomato nitrogen uptake at some point in the season.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- Higher N ratese0
- Outcome
- N uptakee0
- Direction
- greatere0
- Qualifier
- at some point in the growing seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher N rates resulted in greater N uptake for all plants at some point in the growing season.”
e1“tomato (Lycopersicon esculentum Mill.)”
Claim · model-written summary
Higher nitrogen rates increased snap-bean nitrogen uptake at some point in the season.
- Taxon
- snap beane1
- Treatment
- Higher N ratese0
- Outcome
- N uptakee0
- Direction
- greatere0
- Qualifier
- at some point in the growing seasone0
Not reportedComparator
Verbatim
e0“Higher N rates resulted in greater N uptake for all plants at some point in the growing season.”
e1“snap bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Higher nitrogen rates increased sweet-corn nitrogen uptake at some point in the season.
- Taxon
- sweet corne1
- Treatment
- Higher N ratese0
- Outcome
- N uptakee0
- Direction
- greatere0
- Qualifier
- at some point in the growing seasone0
Not reportedComparator
Verbatim
e0“Higher N rates resulted in greater N uptake for all plants at some point in the growing season.”
e1“sweet corn (Zea mays L.)”
Claim · model-written summary
Higher nitrogen rates increased broccoli nitrogen uptake at some point in the season.
- Taxon
- broccoli
Brassica oleracea var. italicae1 - Treatment
- Higher N ratese0
- Outcome
- N uptakee0
- Direction
- greatere0
- Qualifier
- at some point in the growing seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher N rates resulted in greater N uptake for all plants at some point in the growing season.”
e1“broccoli (Brassica olerácea L. Italica group)”
Claim · model-written summary
Higher nitrogen rates increased collard nitrogen uptake at some point in the season.
- Taxon
- collarde1
- Treatment
- Higher N ratese0
- Outcome
- N uptakee0
- Direction
- greatere0
- Qualifier
- at some point in the growing seasone0
Not reportedComparator
Verbatim
e0“Higher N rates resulted in greater N uptake for all plants at some point in the growing season.”
e1“collard (Brassica oleracea L. Acephala group)”
Claim · model-written summary
Higher nitrogen rates increased pumpkin nitrogen uptake at some point in the season.
- Taxon
- pumpkine1
- Treatment
- Higher N ratese0
- Outcome
- N uptakee0
- Direction
- greatere0
- Qualifier
- at some point in the growing seasone0
Not reportedComparator
Verbatim
e0“Higher N rates resulted in greater N uptake for all plants at some point in the growing season.”
e1“pumpkin (Cucurbita pepo L.)”
Claim · model-written summary
Tomato final nitrogen accumulation exceeded fertilizer nitrogen applied at one or more rates.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- Final N accumulatione0
- Direction
- exceedede0
- Qualifier
- at 1 or more N ratese0
- Comparator
- N fertilizer appliede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Final N accumulation exceeded N fertilizer applied at 1 or more N rates for all six crops.”
e1“tomato (Lycopersicon esculentum Mill.)”
Claim · model-written summary
Snap-bean final nitrogen accumulation exceeded fertilizer nitrogen applied at one or more rates.
Verbatim
e0“Final N accumulation exceeded N fertilizer applied at 1 or more N rates for all six crops.”
e1“snap bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Sweet-corn final nitrogen accumulation exceeded fertilizer nitrogen applied at one or more rates.
Verbatim
e0“Final N accumulation exceeded N fertilizer applied at 1 or more N rates for all six crops.”
e1“sweet corn (Zea mays L.)”
Claim · model-written summary
Broccoli final nitrogen accumulation exceeded fertilizer nitrogen applied at one or more rates.
- Taxon
- broccoliBrassica oleracea var. italicae1
- Outcome
- Final N accumulatione0
- Direction
- exceedede0
- Qualifier
- at 1 or more N ratese0
- Comparator
- N fertilizer appliede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Final N accumulation exceeded N fertilizer applied at 1 or more N rates for all six crops.”
e1“broccoli (Brassica olerácea L. Italica group)”
Claim · model-written summary
Collard final nitrogen accumulation exceeded fertilizer nitrogen applied at one or more rates.
Verbatim
e0“Final N accumulation exceeded N fertilizer applied at 1 or more N rates for all six crops.”
e1“collard (Brassica oleracea L. Acephala group)”
Claim · model-written summary
Pumpkin final nitrogen accumulation exceeded fertilizer nitrogen applied at one or more rates.
Verbatim
e0“Final N accumulation exceeded N fertilizer applied at 1 or more N rates for all six crops.”
e1“pumpkin (Cucurbita pepo L.)”
Claim · model-written summary
Higher nitrogen rates increased final nitrogen accumulation only in the tomato/broccoli sequence.
- Taxon
- tomato/broccoliSolanum lycopersicumBrassica oleracea var. italicae0
- Treatment
- higher N ratese0
- Outcome
- final N accumulatione0
- Direction
- greatere0
- Qualifier
- only with the tomato/broccoli sequencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, higher N rates resulted in greater final N accumulation only with the tomato/broccoli sequence.”
Claim · model-written summary
Lower planting density generally increased nitrogen accumulation per plant, whereas high density increased uptake per hectare across the vegetable crops.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- lower densitye0
- Outcome
- N accumulation per plante0
- Direction
- greatere0
- Qualifier
- generallye0
- Comparator
- high density plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: Claim budget requires grouping the density responses across the six named crops and two uptake scales.
Verbatim
e0“Plants grown at lower density generally had greater N accumulation per plant, but N uptake per hectare was greater for the high density planting.”
e1“Spring crops included tomato (Lycopersicon esculentum Mill.), snap bean (Phaseolus vulgaris L.) and sweet corn (Zea mays L.). Each spring crop was followed in the fall by broccoli (Brassica olerácea L. Italica group), collard (Brassica oleracea L. Acephala group) and pumpkin (Cucurbita pepo L.).”
Claim · model-written summary
In 1984, pumpkin following tomato accumulated more nitrogen than in other sequences, the greatest preceding-crop effect.
- Taxon
- pumpkine0
- Treatment
- following tomatoe0
- Interactor
- tomatoSolanum lycopersicume0other
- Outcome
- N accumulatione0
- Direction
- exceedede0
- Qualifier
- in 1984e0
- Comparator
- other sequencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greatest previous crop effect was in 1984 when N accumulation for pumpkin following tomato exceeded that of other sequences.”
Claim · model-written summary
The authors suggest cultural practices probably caused the previous-crop differences in pumpkin nitrogen accumulation.
Verbatim
e0“The greatest previous crop effect was in 1984 when N accumulation for pumpkin following tomato exceeded that of other sequences. Cultural practices probably led to these differences.”
The same questions in other papers
nitrogen · nutrient: content · Solanum lycopersicum (tomato)Results differ
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- negative
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See all 77 papers →nitrogen · nutrient: content · Cucurbita (pumpkins)Positive and negative results
1 paper in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
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nitrogen · nutrient: content · Phaseolus vulgaris (common bean)Positive and negative results
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See all 25 papers →nitrogen · nutrient: content · Brassica oleracea (wild cabbage)Positive and negative results
34 papers in the same direction as this paper · 11 in the opposite direction
- positive
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See all 46 papers →nitrogen · nutrient: content · Zea mays (maize)Positive and negative results
402 papers in the same direction as this paper · 83 in the opposite direction · 3 reporting no difference from an alternative
- positive
- no effect
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See all 489 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.