Intervention effectmodel-written summary

Calcium nitrate plus urea significantly improved apple fruit weight (179.67 g).

A claim from Effect of Nitrogen Sources on Yield, Fruit Quality and Nutritional Status of Apple (Malus×Domestica Borkh.) · 2016

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Calcium nitrate plus urea significantly improved apple fruit weight (179.67 g).

Treatment
calcium nitrate+ureae2
Outcome
fruit weighte2
Direction
significantly improvede2
Value
179.67 ge2

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e2

“The treatment (calcium nitrate+urea) significantly improved fruit weight (179.67 g), total soluble solids content (13.10 B), total sugars (9.99%) and reducing sugars content (7.15%)”

✓ located verbatim in the source · abstract, characters 729–910
t0

“Effect of Nitrogen Sources on Yield, Fruit Quality and Nutritional Status of Apple (Malus×Domestica Borkh.)”

✓ located verbatim in the source · title, characters 0–107

Title

Effect of Nitrogen Sources on Yield, Fruit Quality and Nutritional Status of Apple (Malus×Domestica Borkh.)

Amar Jeet; N. C. Sharma; J. S. Chandel International Journal of Bio-resource and Stress Management 2016. doi:10.23910/ijbsm/2016.7.6.1745

Other claims from this paper (12)

Record rev-869396cf0ea75a4bb93c99e60591d099883222698f585f82c8328c8d5c5ab1bf · schema claims-v0.9 · position 5 in the model’s answer

calcium atom · yield · Malus domestica (apple)Results differ

14 papers: 8 positive, 6 negative or no effect

7 papers in the same direction as this claim · 6 in the opposite direction

  1. no effect
    Calcium sprays had no effect on apple yield, mean fruit weight or fruit skin russeting at harvest.

    EFFECT OF AUTUMN CALCIUM SPRAY AT A HIGH RATE ON ‘GRANNY SMITH’ APPLE QUALITY AND STORABILITY · 2009 · compared with Trees unsprayed with Ca

    Opposite direction

  2. no effect
    Sprays with Ca(NO3)2 in 2000 did not affect fruit calcium level at harvest.

    YIELD AND “JONAGOLD” APPLE FRUIT QUALITY AS INFLUENCED BY SPRING SPRAYS WITH COMMERCIAL ROSATOP MATERIAL CONTAINING CALCIUM AND BORON · 2002 · compared with water

    Opposite direction

  3. negative
    Calcium application reduced yield efficiency.

    Evaluation of pre-harvest foliar calcium applications on ‘Fuji’ apple fruit quality during cold storage · 2017

    Opposite direction

  4. negative
    Five sprays of 0.6% Ca(NO3)2 reduced apple total yield.

    Effect of calcium sprays on fruit quality and shelf-life of apple (Malus × domestica) · 2019

    Opposite direction

  5. no effect
    Preharvest calcium sources had no significant effect on yield across three seasons.

    Preharvest spraying with commercial sources of calcium for bitter pit control in 'Catarina' apples Pulverização de fontes de cálcio em pré-colheita para o controle de "bitter pit" em maçãs 'Catarina' · 2011

    Opposite direction

  6. no effect
    Ca treatments did not affect Ca concentration in fruitlets, leaves or fruit at harvest.

    Supplemental Ca applications did not reduce bitter pit in ‘Honeycrisp’ apples under Ca-sufficient conditions · 2026

    Opposite direction

  7. positive
    The preparation combination increased apple yield 1.7 times.

    Adaptogenic Preparations Enhance the Tolerance to Spring Frosts, Yield and Quality of Apple Fruits · 2023 · compared with control (foliar sprays with water)

    Same direction

  8. positive
    Potassic Soap and Calcium Polysulfide thinning increased apple production of two cultivars in 2006-2007

    Thinning of organic apple production with Potassic Soap and Calcium Polysulfide at the North of Spain. · 2008

    Same direction

5 papers more in this group

See all 14 papers →

nitrogen · yield · Malus domestica (apple)Results differ

69 papers: 52 positive, 17 negative or no effect

51 papers in the same direction as this claim · 17 in the opposite direction

  1. no effect
    The same nitrogen dose applied within grassland produced no production benefit.

    Effect of Nitrogen Fertilization of Apple Orchard on Soil Mineral Nitrogen Content, Yielding of the Apple Trees and Nutritional Status of Leaves and Fruits · 2022

    Opposite direction

  2. negative
    At harvest the lowest N treatment gave smaller fruit than higher N supplies.

    Differential Effects of Nitrogen Supply on Skin Pigmentation and Flesh Starch Breakdown of ‘Gala’ Apple · 2011 · compared with higher N supplies

    Opposite direction

  3. no effect
    Manurial (N, P, K) and soil management treatments had little effect on calcium concentration other than via fruit size.

    The effects of environment and cultural practices on calcium concentration in the apple fruit · 1979

    Opposite direction

  4. no effect
    Increased ammonium did not affect fruit size, dry matter, dissolved solids, acidity, or juice pH.

    Fruit Quality and Nitrogen, Potassium, and Calcium Content of Apple as Influenced by Nitrate: Ammonium Ratios in Tree Nutrition · 2014

    Opposite direction

  5. no effect
    Increasing fertiliser rate from 63 to 189 kg N ha −1 had negligible or inconsistent effects on tree growth, fruit yield and size

    Effects of alley sward width, irrigation and nitrogen fertiliser on growth and yield of Cox's orange pippin apple trees · 1990 · compared with from 63

    Opposite direction

  6. negative
    At higher potash, nitrogen decreased apple nectar yield.

    The influence of nitrogen, phosphate and potash on the secretion of nectar. Part I · 1954

    Opposite direction

  7. no effect
    Fruit yield and fruit efficiency did not differ among treatments within cultivar.

    Foliar urea applications to apple trees increase yeast assimilable nitrogen, amino acids, and flavor volatiles in fruit and hard cider · 2024

    Opposite direction

  8. no effect
    Additional nitrogen fertiliser had no significant effect on growth and yield of apple cultivar Antei.

    Effect of Nitrogen Fertiliser on Growth and Production of Apples in the Conditions of Latvia · 2017

    Opposite direction

60 papers more in this group

See all 69 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.