Intervention effectmodel-written summary

Total yield was maximum at 200 kg N/ha.

A claim from Effects of nitrogen on yield and chlorophyll of potato (Solanum tuberosum L.) cultivars · 1970

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Total yield was maximum at 200 kg N/ha.

Treatment
200 kg N/hae0
Outcome
total yielde0
Direction
Maximume0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

“Maximum total yield was obtained at 200 kg N/ha”

✓ located verbatim in the source · abstract, characters 588–635
t0

“potato”

✓ located verbatim in the source · title, characters 48–54

Title

Effects of nitrogen on yield and chlorophyll of potato (Solanum tuberosum L.) cultivars

Semiha Güler Bangladesh Journal of Botany 1970. doi:10.3329/bjb.v38i2.5141

Other claims from this paper (7)

Record rev-2cbb478b3124d5de79ad3277611351731d836fed1cbaeeba7da998910f72d87b · schema claims-v0.9 · position 3 in the model’s answer

nitrogen · yield · Solanum tuberosum (potato)Results differ

132 papers: 109 positive, 23 negative or no effect

108 papers in the same direction as this claim · 20 in the opposite direction · 3 reporting no difference from an alternative

  1. positive
    Tuber yield rose up to intermediate nitrogen doses of 60 kg ha −1 in 1990 and 120 kg ha −1 in 1991.

    Nitrogen Nutrition of Potato Cultivars Differing in Maturity · 1999

    Same directionCited by this paper

  2. positive
    Total tuber yield for all three cultivars peaked at 168 kg N ha −1.

    Yield and quality of three potato cultivars under series of nitrogen rates · 2020

    Same directionCites this paper

  3. no effect
    PCU and soluble nitrogen at equivalent rates yielded similarly in total and grade A tubers.

    Potato Response to a Polymer‐Coated Urea on an Irrigated, Coarse‐Textured Soil · 2009 · compared with soluble N

    Opposite direction

  4. negative
    Under dry soil conditions, split nitrogen application reduced tuber yield and size.

    Rate and timing of nitrogen fertilization of Russet Burbank potato: Yield and processing quality · 2004

    Opposite direction

  5. negative
    Variable-rate nitrogen application was unprofitable for the field compared with uniform nitrogen application.

    ECONOMIC AND ENVIRONMENTAL FEASIBILITY OF VARIABLE RATE NITROGEN FERTILIZER APPLICATION WITH CARRY-OVER EFFECTS · 1998 · compared with uniform nitrogen application

    Opposite direction

  6. negative
    Inadequate nitrogen limited production of maize and potatoes after the first year.

    Pasture growth and soil fertility · 1965

    Opposite direction

  7. no effect
    Potato yield was similar between N rates applied at emergence, except one farm in 2010

    Nitrogen Fertilizer Rate and Application Timing for Chipping Potato Cultivar Atlantic · 2014

    Opposite direction

  8. no effect
    At soil nitrate-supplying power of at least 50 p.p.m. N, added nitrogen gave little or no potato yield increase.

    MEASUREMENT OF NITRATE-SUPPLYING POWER OF SOILS BY AN INCUBATION METHOD AND CORRELATION WITH CROP YIELD RESPONSE · 1958

    Opposite direction

123 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.