Intervention effectmodel-written summary

UTEC urea increased potato yield relative to control by 35.6%.

A claim from EFFECTIVENESS OF UREA WITH UREASE INHIBITOR – UTEC TO THE POTATO · 2019

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

UTEC urea increased potato yield relative to control by 35.6%.

Treatment
urea UTECe0
Outcome
total yielde0
Direction
increasee0
Value
35.6%e0
Comparator
controle0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier

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

“The use of urea UTEC provide the potato yield of 56.4 t/ha, with marketable tubers fraction up to 54.82 t/ha, the total yield increase to the control – 35.6%”

✓ located verbatim in the source · abstract, characters 873–1030

Title

EFFECTIVENESS OF UREA WITH UREASE INHIBITOR – UTEC TO THE POTATO

V. G. Sychev; N. I. Akanova; M. M. Vizirskaya VEGETABLE CROPS OF RUSSIA 2019. doi:10.18619/2072-9146-2019-3-104-108

Record rev-5f9ef9cc3fcc1be638156ab7fa49b23b5857085d9e6de7e66f4ee98ceb3c8b89 · schema claims-v0.9 · position 1 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. 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

  2. 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

  3. 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

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

    Pasture growth and soil fertility · 1965

    Opposite direction

  5. 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

  6. 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

  7. no effect
    Water supply and nitrogen source did not change potato harvest index, which varied between 0.7 and 0.8.

    Harvest index of potato crop grown under different nitrogen and water supply. · 2009

    Opposite direction

  8. negative
    Urea gave slightly smaller potato tuber yield increases than ammonium sulphate at 40–60 lb./acre.

    Field experiments on the value of urea as a fertilizer for barley, sugar beet, potatoes, winter wheat and grassland in Great Britain · 1963 · compared with ammonium sulphate

    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.