Intervention effectmodel-written summary

The 150% nitrogen rate increased yield of both cultivars in nine site-years and of semi-dwarf barley in four additional site-years.

A claim from Barley Productivity Response to Polymer‐Coated Urea in a No‐Till Production System · 2011

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The 150% nitrogen rate increased yield of both cultivars in nine site-years and of semi-dwarf barley in four additional site-years.

Treatment
150% N fertilizer ratee0
Outcome
yielde0
Direction
increasede0
Value
9 of 20 site‐yearse0

Not reportedTaxonMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier

Verbatim

e0

“The 150% N fertilizer rate increased yield of both cultivars in 9 of 20 site‐years and of the semi‐dwarf cultivar in four additional site‐years”

✓ located verbatim in the source · abstract, characters 772–915

Title

Barley Productivity Response to Polymer‐Coated Urea in a No‐Till Production System

R. E. Blackshaw; X. Hao; K. N. Harker; et al. Agronomy Journal 2011. doi:10.2134/agronj2010.0494

Other claims from this paper (7)

Record rev-dbdd1a0c5315a7ccb3a85a3b52790f7c33a6106131e66be1982de0e15ff216bf · schema claims-v0.9 · position 3 in the model’s answer

fertilization · yield · Hordeum vulgare (barley)Positive and negative results

550 papers: 473 positive, 77 negative or no effect

472 papers in the same direction as this claim · 66 in the opposite direction · 11 reporting no difference from an alternative

  1. positive
    Nitrogen fertilization significantly increased barley grain yields each rotation year.

    Irrigated, No‐Till Corn and Barley Response to Nitrogen in Northern Colorado · 2007 · compared with 0

    Same directionCited by this paper

  2. positive
    Fertilizer P increased grain and straw yields, especially in drier years.

    Concentration of N, P and K in leaves, straw and grain of wheat and barley as influenced by N and P fertilizers under semi-arid conditions · 1980

    Same directionCited by this paper

  3. no effect
    Neither phosphorus application nor mycorrhizal inoculation increased tiller number.

    Effects of Arbuscular Mycorrhizal Fungi and Phosphorus Fertilization on Growth and Nutrient Uptake of Barley Grown on Soils with Different Levels of Salts · 2003

    Opposite direction

  4. negative
    N fertilizer reduced relative yield totals.

    Root and Shoot Interactions Between Barley and Field Beans When Intercropped · 1982

    Opposite direction

  5. negative
    Nitrogen fertilizer alone did not raise yield on barley residue to yield on pulse residue.

    YIELD EFFECT OF PULSES ON SUBSEQUENT CEREAL CROPS IN THE NORTHERN PRAIRIES · 1990 · compared with pulse residue

    Opposite direction

  6. no effect
    Incorporation timing of feedlot cattle manure had no impact on soil or crop performance.

    Effect of rate, frequency and incorporation of feedlot cattle manure on soil nitrogen availability, crop performance and nitrogen use efficiency in east-central Saskatchewan · 2004

    Opposite direction

  7. no effect
    Cropping without nutrients did not significantly improve productivity of severely eroded land.

    EFFECTIVENESS OF MANURE AND COMMERCIAL FERTILIZER IN RESTORING PRODUCTIVITY OF AN ARTIFICIALLY ERODED DARK BROWN CHERNOZEMIC SOIL UNDER DRYLAND CONDITIONS · 1988

    Opposite direction

  8. negative
    Manure lowered barley seed yield relative to mineral fertilizer.

    Manure, Tillage, and Crop Rotation: Effects on Residual Weed Interference in Spring Barley Cropping Systems · 1998 · compared with mineral fertilizer

    Opposite direction

541 papers more in this group

See all 550 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.