Intervention effectmodel-written summary

Nitrogen and nitrogen-phosphorus increased pine seedling growth.

A claim from Loblolly Pine Seedling Response to Fertilizer and Lime Treatments on a Spodosol · 1991

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nitrogen and nitrogen-phosphorus increased pine seedling growth.

Taxon
pinePinuse0
Treatment
Nitrogen, and N‐P in combinatione0
Outcome
growthe0
Direction
increasede0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

Pinus
Pinus · Taxon · picture of the genus (one of its species)Forest Service Northern Region from Missoula, MT, USA · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Nitrogen, and N‐P in combination resulted in increased growth of the pine seedlings.”

✓ located verbatim in the source · abstract, characters 340–424

Title

Loblolly Pine Seedling Response to Fertilizer and Lime Treatments on a Spodosol

C. L. Coultas; Y. P. Hsieh; W. H. McKee Soil Science Society of America Journal 1991. doi:10.2136/sssaj1991.03615995005500030033x

Other claims from this paper (8)

Record rev-682902746ec92cedb250e0f111341f3cbb238b20ac1be96a68b79f18b2ae344c · schema claims-v0.9 · position 1 in the model’s answer

nitrogen · growth · PinusPositive and negative results

5 papers: 3 positive, 2 negative or no effect

2 papers in the same direction as this claim · 2 in the opposite direction

  1. negative
    Root growth of pine seedlings was drastically reduced by supplied ammonium.

    Different effects of supplied ammonium on glutamine synthetase activity in mustard (Sinapis alba) and pine (Pinus sylvestris) seedlings · 1989

    Opposite direction

  2. negative
    Nitrogen reduced fine root biomass in both plantations.

    Short-Term Effects of N Deposition on Soil Respiration in Pine and Oak Monocultures · 2025

    Opposite direction

  3. positive
    Adding nitrogen to pine bark improved plant growth compared with bark alone.

    Nitrogen and Cotton Gin Waste Enhance Effectiveness of Pine Bark Soil Amendment · 2004 · compared with pine bark alone

    Same direction

  4. positive
    At a high phosphorus rate, nitrogen plus phosphorus gave a better growth response than phosphorus alone in young pines.

    Fertilization of Young Pines on Georgia Coastal Plain Soils · 1978 · compared with P alone

    Same direction

See all 5 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.