Intervention effectmodel-written summary

Grain yield increased linearly with split urea rate, with a slope varying by year.

A claim from Yield Response to Urea and Controlled-Release Urea as Affected by Water Supply in Tropical Upland Rice · 2005

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Grain yield increased linearly with split urea rate, with a slope varying by year.

Taxon
upland riceOryza sativae0
Treatment
increasing N rate in split ureae1
Outcome
yielde1
Direction
responded linearlye1
Qualifier
different slope in each yeare1

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“upland rice (Oryza sativa L.)”

✓ located verbatim in the source · abstract, characters 103–132
e1

“yield responded linearly to increasing N rate in split urea, but along a different slope in each year”

✓ located verbatim in the source · abstract, characters 810–911

Title

Yield Response to Urea and Controlled-Release Urea as Affected by Water Supply in Tropical Upland Rice

M. Kondo; C. V. Singh; R. Agbisit; et al. Journal of Plant Nutrition 2005. doi:10.1081/pln-200047601

Other claims from this paper (6)

Record rev-92d174116a58e8cddceb737ae314822bcf19c843cfd4cfa968b878de7c152564 · schema claims-v0.9 · position 1 in the model’s answer

nitrogen · yield · Oryza sativa (rice)Positive and negative results

2,045 papers: 1,803 positive, 242 negative or no effect

1,802 papers in the same direction as this claim · 193 in the opposite direction · 49 reporting no difference from an alternative

  1. positive
    CRU increased rice yield by 10.8% over FFP.

    Application of Controlled-Release Urea Enhances Grain Yield and Nitrogen Use Efficiency in Irrigated Rice in the Yangtze River Basin, China · 2018 · compared with FFP

    Same directionCites this paper

  2. positive
    Coated urea raised grain yield in 1997 under poor water management.

    EFFECT OF WATER MANAGEMENT AND POLYOLEFIN-COATED UREA ON GROWTH AND NITROGEN UPTAKE OF INDICA RICE · 2002 · compared with urea

    Same directionCited by this paper

  3. positive
    Applying 60 kg N/ha increased grain yield by only 0.24 Mg/ha over the unfertilized control in unweeded plots.

    Influence of nitrogen and weed management on the productivity of upland rice · 2008 · compared with unfertilized control

    Same directionCites this paper

  4. positive
    nitrogen applied @ 20 kg/ha as basal + LCC-4 at 20 kg N/ha produced the highest dry matter accumulation in rice (1411.97 g/sq. m).

    Effect of Different Levels of Nitrogen and Silicon in Rice under Red and Laterite Soil · 2024

    Same directionCites this paper

  5. negative
    Green manure and rice straw nitrogen, alone or in combination with inorganic N, gave lower grain yield, agronomic efficiency and apparent nitrogen uptake than a standard split application of prilled urea.

    Long-term Comparison of the Agronomic Efficiency and Residual Benefits of Organic and Inorganic Nitrogen Sources for Tropical Lowland Rice · 1996 · compared with a standard split application of prilled urea

    Opposite direction

  6. negative
    Chaffy grain number and chaffy grain weight per 5 panicles increased significantly with enhancing nitrogen doses.

    Physiological response of rice (Oryza sativaL.) genotypes to elevated nitrogen applied under field conditions · 2014

    Opposite direction

  7. negative
    Excessive nitrogen yielded 2.68–6.31% less than appropriate nitrogen application.

    Excessive Nitrogen Application Leads to Lower Rice Yield and Grain Quality by Inhibiting the Grain Filling of Inferior Grains · 2022 · compared with appropriate nitrogen application (270 kg N ha−1)

    Opposite direction

  8. negative
    SCU reduced rice yield, though not significantly.

    Effects of different types of slow- and controlled-release fertilizers on rice yield · 2021

    Opposite direction

2,036 papers more in this group

See all 2,045 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.