Search claims · PlantClaims

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Limited water availability reduced maize N uptake across all N treatments.

Taxon: maizeZea mayst0
Treatment: limited water availabilitye0
Outcome: N uptakee0
Direction: reducede0
Qualifier: across all N treatmentse0

Not reportedComparator

Verbatim

e0
“limited water availability reduced N uptake across all N treatments”
✓ located verbatim in the source · abstract, characters 1231–1298

t0
“in maize”
✓ located verbatim in the source · title, characters 82–90

Title

High N availability decreases N uptake and yield under limited water availability in maize

Nora E. Flynn; Louise H. Comas; Catherine E. Stewart; et al. Scientific Reports 2023. doi:10.1038/s41598-023-40459-0

Other claims from this paper (5)

Intervention effect Moderately high soil N depressed maize grain yield under limited and full water availability.
Intervention effect Moderately high soil N depressed maize shoot growth under both water regimes.
Observation Moderately high soil N carried additional risk of deleterious N losses.
Observation Under low N, aboveground plant tissues recovered more N than was applied in both water regimes.
Intervention effect Limited water availability left 30% more deep soil nitrate than full water availability.

Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Chemical N availability indexes can be used to assess soil N availability on sludge-treated land when calibrated locally.

Taxon: maizeZea mayse0
Outcome: chemical N availability indexes can be used to assess soil N availability on sludge treated lande5

Verbatim

e0
“maize ( Zea mays L.) total N uptake was determined”
✓ located verbatim in the source · abstract, characters 525–575

e5
“chemical N availability indexes can be used to assess soil N availability on sludge treated land”
✓ located verbatim in the source · abstract, characters 1425–1521

Title

Evaluation of Nitrogen Availability Indexes for a Sludge Compost Amended Soil

Barry E. O'Keefe; J. Axley; J. J. Meisinger Journal of Environmental Quality 1986. doi:10.2134/jeq1986.00472425001500020007x

Other claims from this paper (4)

Method / resource All N availability methods were equally sensitive on sludge-treated soils.
Method / resource The incubation procedure was the best N availability method on untreated soil.
Method / resource Regressions of maize N uptake on the six N indexes gave R2 values of 0.92 to 0.95.
Method / resource Including second zone soil N and a root-zone volume basis improved maize N uptake predictions with unfertilized controls.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

High N inputs increased soil N availability in forests dominated by white spruce.

Treatment: High N inputse0
Outcome: soil N availabilitye1
Direction: increasede1

Not reportedTaxonComparator

Verbatim

e0
“High N inputs”
✓ located verbatim in the source · abstract, characters 473–486

e1
“increased soil N availability”
✓ located verbatim in the source · abstract, characters 492–521

Title

Ectomycorrhizal Fungal Aboveground Community Change over an Atmospheric Nitrogen Deposition Gradient

E. A. Lilleskov; T. J. Fahey; G. M. Lovett Ecological Applications 2001. doi:10.2307/3060897

Other claims from this paper (15)

Associationobservedoriginal resultmeasured

Claim · model-written summary

Ragweed shows greater plasticity in response to water availability than to N availability.

Taxon: ragweede7
Treatment: water availabilitye7
Outcome: plasticitye7
Direction: greatere7
Comparator: N availabilitye7

Verbatim

e7
“ragweed’s greater plasticity in response to water availability compared to N availability”
✓ located verbatim in the source · abstract, characters 912–1001

Title

Water and nitrogen use efficiency of common ragweed (Ambrosia artemisiifolia L.) at different nitrogen and water levels

Robert LESKOVŠEK; Klemen ELER; Franc BATIČ; et al. Acta agriculturae Slovenica 2012. doi:10.14720/aas.2012.99.1.14518

Other claims from this paper (8)

Associationauthor interpretationoriginal resultmeasured

Claim · model-written summary

FR N:P ratio was affected more by N availability than by P availability in P. tabulaeformis forests on the Loess Plateau.

Taxon: P. tabulaeformisPinus tabuliformise4
Treatment: N availabilitye4
Outcome: FR N:P ratioe4
Comparator: P availabilitye4

Not reportedDirection

Verbatim

e4
“indicating that FR N:P ratio was affected more by N availability than by P availability in P. tabulaeformis forests on the Loess Plateau”
✓ located verbatim in the source · abstract, characters 1248–1384

Title

The production and nutrients in the fine roots of fertilized Pinus tabulaeformis plantation forests in the Loess Plateau in China

Lili Chen; Zhiyou Yuan; T. Ryan Lock; et al. Journal of Forest Research 2021. doi:10.1080/13416979.2021.1897065

Other claims from this paper (4)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Chickpea residue increased soil N availability in footslopes.

Taxon: chickpeaCicer arietinume0
Treatment: Chickpea residuee0
Outcome: soil N availabilitye0
Direction: increasede0
Setting: footslopese0

Not reportedComparator

Verbatim

e0
“Chickpea residue increased soil N availability and crop production, whereas wheat residue decreased crop production in the footslopes”
✓ located verbatim in the source · abstract, characters 500–633

Title

Does crop residue N influence soil N availability

Guanghui Fu; F.L. Walley; Chris van Kessel 1998

Other claims from this paper (4)

Intervention effect Plant soil-derived N, added nitrogen interaction, and residue N recovery were higher for chickpea than wheat residue in footslopes but not shoulders.
Intervention effect Chickpea residue increased crop production in footslopes.
Intervention effect Wheat residue decreased crop production in footslopes.
Observation The two residues did not differ in shoulders.

Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

Clover growth rates were independent of mineral N availability, except for a slight reduction at very low N availability.

Taxon: CloverTrifoliume3
Treatment: mineral N availabilitye3
Outcome: growth ratese3
Direction: independente3
Qualifier: except for a slight (<10%) reduction at very low N availability levelse3

Verbatim

e3
“Clover growth rates were also independent of mineral N availability except for a slight (<10%) reduction at very low N availability levels”
✓ located verbatim in the source · abstract, characters 909–1047

Title

The nitrogen handling characteristics of white clover (Trifolium repens L.) cultivars and a perennial ryegrass (Lolium perenne L.) cultivar

G.S. Griffith Journal of Experimental Botany 2000. doi:10.1093/jexbot/51.352.1879

Other claims from this paper (13)

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Lower N availability left cotton plants N deficient.

Taxon: cottonGossypium hirsutume2
Treatment: lower N availabilitye2
Outcome: N deficiente2

Not reportedDirection

Verbatim

e2
“The lower N availability resulted in N deficient and shorter cotton plants with lower dry matter yields”
✓ located verbatim in the source · abstract, characters 789–892

Title

Nitrogen Immobilization by Congo Grass Roots Impairs Cotton Initial Growth

Ciro A. Rosolem; Fabio Steiner; Samuel M. Zoca; et al. Journal of Agricultural Science 2012. doi:10.5539/jas.v4n9p126

Other claims from this paper (7)

Observation Congo grass roots lost 14% of their mass after 45 days.
Observation Congo grass roots had a higher C/N ratio than shoots.
Association Congo grass roots increased soil N immobilization.
Observation Lower N availability gave cotton plants lower dry matter yields.
Observation Lower N availability made cotton plants shorter.
Intervention effect Applying 80 to 120 mg kg-1 of N compensated for the immobilization by soil microorganisms and let cotton grow normally.
Association When Congo grass is present, decaying roots affect soil N dynamics and availability more than the straw left on the soil surface does.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

P addition reduced resin N availability by 31%.

Taxon: northern hardwood forestst0
Treatment: P additione0
Outcome: resin-N availabilitye0
Direction: suppressede0
Value: 31 %e0

Not reportedComparator

Verbatim

t0
“northern hardwood forests”
✓ located verbatim in the source · title, characters 45–70

e0
“P addition suppressed resin-N availability by 31 %”
✓ located verbatim in the source · abstract, characters 824–874

Title

Elevated P availability slows N recycling in northern hardwood forests

Shinjini Goswami; Melany C. Fisk Forest Ecology and Management 2024. doi:10.1016/j.foreco.2024.122203

Other claims from this paper (10)

Intervention effect Forest age did not affect resin available N:P ratios.
Association Resin available N:P ratios varied widely among stands and related to forest floor net N mineralization potentials.
Intervention effect P addition reduced litterfall N recycling by 10%.
Intervention effect P addition had no detected effect on net N mineralization potentials.
Intervention effect P addition increased organic horizon nitrification potentials by up to 60%, mostly with added N.
Intervention effect Adding N with P lowered resin P in mature stands.
Intervention effect Adding N with P lowered litterfall P recycling across stand ages.
Association Net N mineralization potential predicted resin N response to P better than stand age.
Association The authors infer P limitation influences N recycling across forest ages, possibly more in successional stands.
Intervention effect The authors propose that alleviating P limitation promotes N limitation over time through higher biotic N demand and lower litterfall recycling.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Both organic fertilizer treatments began with low nitrate-N availability and high ammonium-N availability.

Taxon: sweet basil and Pelargonium × hortorumPelargonium ×hortorumOcimum basilicume1
Treatment: organic treatmentse0
Outcome: nitrate-N availabilitye0
Direction: lowe0

Verbatim

e0
“For both organic treatments, nitrate-N availability was low at the beginning of the experiment, whereas ammonium-N was high”
✓ located verbatim in the source · abstract, characters 898–1021

e1
“sweet basil and Pelargonium × hortorum were cultivated using two different organic fertilizer strategies”
✓ located verbatim in the source · abstract, characters 371–475

Title

Dynamics of nitrogen availability in pot grown crops with organic fertilization

Karl-Johan Bergstrand; Klara Löfkvist; Håkan Asp Biological Agriculture & Horticulture 2018. doi:10.1080/01448765.2018.1498389

Other claims from this paper (10)

Observation Both organic fertilizer treatments began with high ammonium-N availability.
Observation During crop growth, ammonium availability decreased.
Observation Nitrate availability increased after several weeks, then declined by the end of the experiment.
Intervention effect Blood meal plus Enslow caused poor basil germination.
Intervention effect Blood meal plus Enslow caused slow basil growth.
Intervention effect Blood meal plus Enslow affected basil height and fresh weight.
Intervention effect Blood meal plus Enslow did not affect Pelargonium height and fresh weight.
Intervention effect Leaf chlorophyll concentration varied by treatment, with paler leaves under poultry manure.
Observation Chlorophyll fluorescence did not differ between fertilizer treatments.
Observation The authors interpreted the similar fluorescence values as indicating no treatment stress.

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