Intervention effectmodel-written summary

Leaves without applied nitrogen reached photosynthetic rates as high as nitrogen-treated leaves.

A claim from Field measurements of the photosynthetic rate of potatoes grown with different amounts of nitrogen fertilizer · 1988

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Leaves without applied nitrogen reached photosynthetic rates as high as nitrogen-treated leaves.

Taxon
potatoesSolanum tuberosumt0
Organ / stage
leavese0
Treatment
without applied Ne0
Outcome
Rates of photosynthesise0
Direction
as high ase0
Comparator
those receiving Ne0

Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Rates of photosynthesis in leaves of plants grown without applied N reached levels as high as those receiving N in all experiments.”

✓ located verbatim in the source · abstract, characters 162–293
t0

“potatoes”

✓ located verbatim in the source · title, characters 49–57

Title

Field measurements of the photosynthetic rate of potatoes grown with different amounts of nitrogen fertilizer

D. M. Firman; E. J. Allen The Journal of Agricultural Science 1988. doi:10.1017/s0021859600082848

Other claims from this paper (4)

Record rev-7e73a3e566e048dbecc25c335f8f1adf22ab4802787a1ae3d75735d86ca667e9 · schema claims-v0.9 · position 1 in the model’s answer

nitrogen · physiology: photosynthesis · Solanum tuberosum (potato)Positive and negative results

6 papers: 2 positive, 4 negative or no effect

3 papers in the same direction as this claim · 2 in the opposite direction

This claim is about lacking the nutrient, so it counts the other way round here.

  1. positive
    Compared with fenoxaprop alone, 4 g L-1 urea with 1.33 ml L-1 fenoxaprop significantly increased Pn of potato plants by 36.12.

    Fenoxaprop combined with urea improves photosynthesis, weed control, and yield of potato · 2020 · compared with fenoxaprop treatment alone

    Opposite direction

  2. positive
    At the same water level, 1.68 g N L-1 gave significantly higher net photosynthetic rate, stomatal conductance and transpiration rate than other nitrogen levels.

    Influence of early nitrogen application on physiological properties and ultrastructures of functional leaves of potatoes under drought stress · 2018 · compared with other nitrogen treatment levels

    Opposite direction

  3. negative
    Nitrogen supply above 10 g m-2 reduced Fv/Fm in potato.

    Chlorophyll fluorescence and chlorophyll content in field-grown potato as affected by nitrogen supply, genotype, and plant age · 2006

    Same direction

  4. no effect
    Nitrogen application did not raise photosynthetic rate during tuber swelling.

    Production efficiency of nitrogen absorbed by-potato plant at various growth stages · 1993

    Same direction

  5. negative
    Nitrogen-phosphorus and nitrogen-potassium fertilizer combinations did not provide high photosynthetic potential rates in potato plantings under increased soil nitrogen.

    The effectiveness of the use of mineral fertilizers in the technology of potato seed production in the conditions of the mountainous zone of Kabardino-Balkaria · 2022 · compared with against the background of increased nitrogen content in the soil

    Same direction

See all 6 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.