Paper · 1984 · Journal of Environmental Horticulture

Grass Competition for Nitrogen Around Landscape Trees

Dan Neely

5
claims
5
verbatim quotes
6
citations
3
research areas
✓
Open access

Abstract

The sod around established saplings was treated with the nitrogenous fertilizer ammonium nitrate and/or the herbicide Roundup (glyphosate). Compared with untreated trees, all treatments increased the shoot growth of black walnut ( Juglans nigra L.), and the trunk growth of sycamore ( Platanus occidentalis L.), Norway maple ( Acer platanoides L.), and honey-locust ( Gleditsia triacanthos L. inermis Willd.). The response in walnut persisted for 2 growing seasons following application.

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Claims 5

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fertilizer or herbicide treatment increased black walnut shoot growth relative to untreated trees.

Taxon
black walnutJuglans nigrae0
Treatment
ammonium nitrate and/or the herbicide Roundup (glyphosate)e0
Outcome
shoot growthe0
Direction
increasede0
Comparator
untreated treese0

Not reportedInteractorInteractor role

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

Juglans nigra
Juglans nigra · TaxonPhoto by and (c)2007 Derek Ramsey ( Ram-Man ). Location credit to the Chanticleer Garden. · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The sod around established saplings was treated with the nitrogenous fertilizer ammonium nitrate and/or the herbicide Roundup (glyphosate). Compared with untreated trees, all treatments increased the shoot growth of black walnut ( Juglans nigra L.)”

✓ located verbatim in the source · abstract, characters 0–248 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fertilizer or herbicide treatment increased sycamore trunk growth relative to untreated trees.

Taxon
sycamoree0
Treatment
ammonium nitrate and/or the herbicide Roundup (glyphosate)e0
Outcome
trunk growthe0
Direction
increasede0
Comparator
untreated treese0

Verbatim

e0

“The sod around established saplings was treated with the nitrogenous fertilizer ammonium nitrate and/or the herbicide Roundup (glyphosate). Compared with untreated trees, all treatments increased the shoot growth of black walnut ( Juglans nigra L.), and the trunk growth of sycamore ( Platanus occidentalis L.), Norway maple ( Acer platanoides L.), and honey-locust ( Gleditsia triacanthos L. inermis Willd.)”

✓ located verbatim in the source · abstract, characters 0–408 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fertilizer or herbicide treatment increased Norway maple trunk growth relative to untreated trees.

Taxon
Norway mapleAcer platanoidese0
Treatment
ammonium nitrate and/or the herbicide Roundup (glyphosate)e0
Outcome
trunk growthe0
Direction
increasede0
Comparator
untreated treese0

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

Acer platanoides
Acer platanoides · TaxonAnRo0002 · CC0 · Wikimedia Commons ↗

Verbatim

e0

“The sod around established saplings was treated with the nitrogenous fertilizer ammonium nitrate and/or the herbicide Roundup (glyphosate). Compared with untreated trees, all treatments increased the shoot growth of black walnut ( Juglans nigra L.), and the trunk growth of sycamore ( Platanus occidentalis L.), Norway maple ( Acer platanoides L.), and honey-locust ( Gleditsia triacanthos L. inermis Willd.)”

✓ located verbatim in the source · abstract, characters 0–408 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fertilizer or herbicide treatment increased honey-locust trunk growth relative to untreated trees.

Taxon
honey-locustGleditsia triacanthose0
Treatment
ammonium nitrate and/or the herbicide Roundup (glyphosate)e0
Outcome
trunk growthe0
Direction
increasede0
Comparator
untreated treese0

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

Gleditsia triacanthos
Gleditsia triacanthos · TaxonKevmin · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The sod around established saplings was treated with the nitrogenous fertilizer ammonium nitrate and/or the herbicide Roundup (glyphosate). Compared with untreated trees, all treatments increased the shoot growth of black walnut ( Juglans nigra L.), and the trunk growth of sycamore ( Platanus occidentalis L.), Norway maple ( Acer platanoides L.), and honey-locust ( Gleditsia triacanthos L. inermis Willd.)”

✓ located verbatim in the source · abstract, characters 0–408 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Walnut shoot-growth response persisted for two growing seasons.

Taxon
walnute0
Outcome
response in walnute0
Value
2 growing seasonse0

Verbatim

e0

“The response in walnut persisted for 2 growing seasons following application”

✓ located verbatim in the source · abstract, characters 410–486 · show in text ↑

herbicide · growth · Acer platanoides (Norway maple)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. no effect
See all 2 papers →

herbicide · growth · Juglans nigra (black walnut)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

herbicide · growth · Gleditsia triacanthos (honey locust)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 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.