Abstract
Abstract Optimizing nitrogen (N) application rate is essential for effective N management and requires an understanding of crop growth dynamics, nutrient partitioning, cultivar traits, and soil characteristics. The effects of seven in‐season N rates (37–391 kg N ha −1 ) on dry matter (DM) and N accumulation and partitioning at early‐ and late‐growth stages and tuber yield and quality of potato ( Solanum tuberosum L.) cv. Goldrush grown in the sandy soils of central Wisconsin were evaluated over three growing seasons. The objective was to identify optimal regression models to achieve a sustainable balance between maximizing marketable tuber yield and economic profitability. In‐season N applications improved total N uptake and tuber N concentration but reduced DM and N partitioning to tuber. Yield gains were most consistent between 277 and 295 kg N ha − 1 , with no additional benefit beyond this range. While the quadratic and linear‐plateau models best described total and marketable yield, respectively, model fits were similar, and critical N rates varied by <7%. Relative yield normalization improved model accuracy across years. These findings support model‐based, site‐ and cultivar‐specific N recommendations to improve N use efficiency and the need for broader, multi‐environment datasets to refine predictive models and ensure both agronomic performance and environmental sustainability in potato production systems.
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Claims 12
Claim · model-written summary
In-season nitrogen increased total nitrogen uptake.
- Taxon
- potato
Solanum tuberosumt0 - Material
- goldrusht0
- Treatment
- In‐season N applicationse0
- Outcome
- total N uptakee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In‐season N applications improved total N uptake”
t0“goldrush potato”
Claim · model-written summary
In-season nitrogen increased tuber nitrogen concentration.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Treatment
- In‐season N applicationse0
- Outcome
- tuber N concentratione0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In‐season N applications improved total N uptake and tuber N concentration”
t0“goldrush potato”
Claim · model-written summary
In-season nitrogen reduced dry matter partitioning to tubers.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Treatment
- In‐season N applicationse0
- Outcome
- DMe0
- Direction
- reducede0
- Qualifier
- partitioning to tubere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In‐season N applications improved total N uptake and tuber N concentration but reduced DM and N partitioning to tuber”
t0“goldrush potato”
Claim · model-written summary
In-season nitrogen reduced nitrogen partitioning to tubers.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Treatment
- In‐season N applicationse0
- Outcome
- N partitioning to tubere0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In‐season N applications improved total N uptake and tuber N concentration but reduced DM and N partitioning to tuber”
t0“goldrush potato”
Claim · model-written summary
Yield gains were most consistent between 277 and 295 kg N ha − 1.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Treatment
- between 277 and 295 kg N ha − 1e0
- Outcome
- Yield gainse0
- Direction
- most consistente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield gains were most consistent between 277 and 295 kg N ha − 1”
t0“goldrush potato”
Claim · model-written summary
Nitrogen beyond that range gave no additional yield benefit.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Treatment
- beyond this rangee0
- Outcome
- additional benefite0
- Direction
- no additionale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with no additional benefit beyond this range”
t0“goldrush potato”
Claim · model-written summary
The quadratic model best described total yield.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Outcome
- totale0
- Direction
- best describede0
- Qualifier
- yielde0
- Comparator
- linear‐plateau modelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the quadratic and linear‐plateau models best described total and marketable yield, respectively”
t0“goldrush potato”
Claim · model-written summary
The linear-plateau model best described marketable yield.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Outcome
- marketable yielde0
- Direction
- best describede0
- Comparator
- quadratice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the quadratic and linear‐plateau models best described total and marketable yield, respectively”
t0“goldrush potato”
Claim · model-written summary
Model fits were similar and critical nitrogen rates varied by less than 7%.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Outcome
- model fitse0
- Value
- <7%e0
- Comparator
- critical N ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“model fits were similar, and critical N rates varied by <7%”
t0“goldrush potato”
Claim · model-written summary
Relative yield normalization improved model accuracy across years.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Outcome
- model accuracye0
- Direction
- improvede0
- Comparator
- across yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative yield normalization improved model accuracy across years”
t0“goldrush potato”
Claim · model-written summary
The authors support site- and cultivar-specific nitrogen recommendations using models.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Outcome
- model‐based, site‐ and cultivar‐specific N recommendationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“model‐based, site‐ and cultivar‐specific N recommendations to improve N use efficiency”
t0“goldrush potato”
Claim · model-written summary
The authors call for broader multi-environment datasets to refine predictive models.
- Taxon
- potatoSolanum tuberosumt0
- Material
- goldrusht0
- Outcome
- broader, multi‐environment datasetse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broader, multi‐environment datasets to refine predictive models”
t0“goldrush potato”
The same questions in other papers
nitrogen · yield · Solanum tuberosum (potato)Results differ
108 papers in the same direction as this paper · 20 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- no effect
- positive
128 papers more in this group
See all 132 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.