Search claims · PlantClaims

Associationobservedoriginal resultmeasured

Claim · model-written summary

Macroaggregate SOC changes supplied most total SOC accrual in both studies.

Taxon: Treee1
Outcome: total SOC accruale0
Qualifier: macroaggregate SOC changese0
Setting: field and laboratory studiese0

Not reportedDirection

Verbatim

e0
“In both field and laboratory studies, the total SOC accrual was mainly from macroaggregate SOC changes”
✓ located verbatim in the source · abstract, characters 1012–1114

e1
“Tree mycorrhizal association types”
✓ located verbatim in the source · abstract, characters 9–43

Title

Arbuscular mycorrhizal dominated forests facilitate organic carbon stabilization in soil aggregates

Guanchao Cheng; Xinli Chen; Xiting Zhang; et al. Journal of Ecology 2026. doi:10.1111/1365-2745.70332

Other claims from this paper (6)

Associationobservedoriginal resultmeasured

Claim · model-written summary

Addition of new aspen-derived SOC was proportional to loss of existing SOC.

Taxon: aspene0
Outcome: addition of new (aspen‐derived) SOCe0
Comparator: loss of existing SOCe0

Not reportedDirection

Verbatim

e0
“The addition of new (aspen‐derived) SOC was proportional to the loss of existing SOC, evidence for a priming effect.”
✓ located verbatim in the source · abstract, characters 1518–1634

Title

Effects of lignin‐modified Populus tremuloides on soil organic carbon

Raysa Roque‐Rivera; Alan F. Talhelm; Dale W. Johnson; et al. Journal of Plant Nutrition and Soil Science 2011. doi:10.1002/jpln.201000445

Other claims from this paper (5)

Association Lignin modifications changed aspen-derived soil carbon accrual and mesocosm carbon, mainly through biomass differences.
Intervention effect Low-lignin line 23 performed similarly or better than wild-type line 271 without changing SOC.
Intervention effect Line 23 did not alter soil organic carbon relative to wild type.
Intervention effect Changed lignin structure negatively affected biomass production and SOC formation.
Association New SOC was related to total plant biomass.

Mechanismobservedoriginal resultpositivemeasured

Claim · model-written summary

Carbon isotopes indicate that moderate pruning raised SOC stocks through new agroforestry-derived SOC at deeper layers, offsetting surface losses of pasture-derived SOC

Taxon: cocoaTheobroma cacaoe0
Treatment: moderate pruninge3
Outcome: SOC stockse3
Qualifier: agroforestry-derived SOC accumulation at deeper soil layers (>30 cm)e3

Verbatim

e0
“cocoa ( Theobroma cacao ) based agroforestry plots”
✓ located verbatim in the source · abstract, characters 434–484

e3
“A mechanistic assessment through carbon isotopes showed that moderate pruning boosted SOC stocks through new agroforestry-derived SOC accumulation at deeper soil layers (>30 cm), which offset surface losses of pasture-derived SOC”
✓ located verbatim in the source · abstract, characters 1272–1501

Title

Pruning management drives early accumulation of deep soil carbon following agroforestry expansion

Olivia C. Hurley; André S.G. Sousa; Clare M. Stirling; et al. Geoderma 2026. doi:10.1016/j.geoderma.2026.117895

Other claims from this paper (7)

Mechanismhypothesisoriginal resultmeasured

Claim · model-written summary

Reduced rhizodeposit input and suppressed SOC decomposition may explain stable SOC stocks.

Outcome: SOC stocks remained unchangede0
Qualifier: reduced rhizodeposit C input accompanied by suppressed SOC decompositione0

Not reportedTaxon

Verbatim

e0
“SOC stocks remained unchanged, possibly due to reduced rhizodeposit C input accompanied by suppressed SOC decomposition.”
✓ located verbatim in the source · abstract, characters 1349–1469

Title

Trade‐off in carbon allocation between roots and rhizodeposition underpins plant adaptation to acidification in a meadow steppe

Yu Shang; Ruzhen Wang; Bin Wang; et al. Journal of Ecology 2025. doi:10.1111/1365-2745.70143

Other claims from this paper (12)

Intervention effect Soil acidification decreased rhizodeposit C by 13%–60%.
Intervention effect Soil acidification decreased absolute 13 C allocation to soil by 0.8%–51%.
Intervention effect Soil acidification reduced shoot photosynthetic 13 C assimilation by 30%–36%.
Intervention effect S addition increased the fraction of 13 C allocated to roots by 3%–52%.
Association root biomass increased with S addition up to about 20 g S m −2 year −1, then declined.
Association non‐structural carbohydrates (NSC) increased with S addition up to about 20 g S m −2 year −1, then declined.
Association respiration increased with S addition up to about 20 g S m −2 year −1, then declined.
Association Root 13 C was negatively correlated with soil 13 C.
Association Root 13 C was positively associated with root biomass and NSC.
Intervention effect Soil acidification increased below-ground biomass.
Intervention effect SOC stocks remained unchanged under soil acidification.
Mechanism Under acidification, less root photosynthate became rhizodeposit C, while more supported root growth, respiration, and storage.

Observationauthor interpretationoriginal resultmeasured

Claim · model-written summary

SOC radiocarbon age indicated rejuvenation of SOC.

Taxon: foreste1
Organ / stage: roote0
Outcome: rejuvenation of SOCe0

Verbatim

e0
“The radiocarbon age of SOC indicates a rejuvenation of SOC likely by increased input of root carbon into the lower topsoil”
✓ located verbatim in the source · abstract, characters 1186–1308

e1
“in a mountain forest in the Northern Limestone Alps”
✓ located verbatim in the source · abstract, characters 514–565

Title

Increased Belowground Carbon Allocation Reduces Soil Carbon Losses Under Long-Term Warming

Schindlbacher, Andreas; Kwatcho Kengdo, Steve; Heinzle, Jakob; et al. EPub Bayreuth (University of Bayreuth) 2025. doi:10.15495/epub_ubt_00008876

Other claims from this paper (9)

Intervention effect Long-term soil warming increased soil CO2 efflux by about 13% per degree Celsius.
Observation The soil efflux warming response did not change over 18 years.
Intervention effect SOC stocks decreased nonsignificantly under warming compared with controls.
Mechanism Root respiration was especially sensitive to long-term warming and is proposed as the primary driver of increased soil CO2 efflux.
Observation Root production increased under warming.
Observation Fine root turnover was faster under warming.
Observation Root exudation increased under warming.
Mechanism Increased root carbon input is proposed to replenish the SOC pool.
Mechanism Greater allocation into the rhizosphere may partly compensate for warming-driven SOC mineralization loss.

Associationobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Nitrogen and phosphorus had no significant interaction for SOC concentration, LOC concentration or SOC pool.

Treatment: N and Pe0
Outcome: SOC concentration, LOC concentration and SOC poole0
Direction: no significant interactionse0

Not reportedTaxon

Verbatim

e0
“There were no significant interactions between N and P for SOC concentration, LOC concentration and SOC pool”
✓ located verbatim in the source · abstract, characters 1309–1417

Title

Fertilization Affects Biomass Production of Suaeda salsa and Soil Organic Carbon Pool in East Coastal Region of China

Qing-feng MENG; Jing-song YANG; Rong-jiang YAO; et al. Journal of Integrative Agriculture 2013. doi:10.1016/s2095-3119(13)60422-0

Other claims from this paper (15)

Intervention effect Nitrogen and phosphorus application significantly affected above-ground and root biomass.
Intervention effect Nitrogen and phosphorus application significantly affected soil bulk density and available nitrogen and phosphorus.
Intervention effect Nitrogen and phosphorus application significantly affected soil SOC, LOC, SOC pool and CMI.
Association Nitrogen and phosphorus interacted significantly for biomass production.
Observation Nitrogen was the dominant factor for Suaeda salsa production over two years.
Observation CMI had a significant interaction at 0–20 cm depth.
Observation Nitrogen dominated variation in CMI.
Intervention effect Increasing nitrogen and phosphorus rates significantly reduced bulk density at 0–20 cm.
Observation Available nitrogen and phosphorus increased with higher fertilization rates.
Observation SOC, LOC and SOC pool increased in both sampled soil depths.
Observation CMI increased at both sampled soil depths.
Association Above-ground and root biomass correlated positively with SOC and LOC in 2010 and 2011 across soil depths.
Intervention effect The 180 kg ha−1 N plus 105 kg ha−1 P treatment was superior to other treatments.
Observation Nitrogen and phosphorus fertilization produced a little short-term accumulation of SOC and LOC.
Recommendation The authors recommend nitrogen and phosphorus application to Suaeda salsa on coastal tidal lands for carbon sequestration, soil nutrition and quality.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

SOC, LOC and SOC pool increased in both sampled soil depths.

Outcome: SOC, LOC, SOC poole0
Direction: increasede0
Qualifier: both the 0–20 and 20–40 cm depthe0

Not reportedTaxon

Verbatim

e0
“increased available N and P, SOC, LOC, SOC pool as well as CMI at both the 0–20 and 20–40 cm depth”
✓ located verbatim in the source · abstract, characters 1734–1832

Title

Fertilization Affects Biomass Production of Suaeda salsa and Soil Organic Carbon Pool in East Coastal Region of China

Qing-feng MENG; Jing-song YANG; Rong-jiang YAO; et al. Journal of Integrative Agriculture 2013. doi:10.1016/s2095-3119(13)60422-0

Other claims from this paper (15)

Intervention effect Nitrogen and phosphorus application significantly affected above-ground and root biomass.
Intervention effect Nitrogen and phosphorus application significantly affected soil bulk density and available nitrogen and phosphorus.
Intervention effect Nitrogen and phosphorus application significantly affected soil SOC, LOC, SOC pool and CMI.
Association Nitrogen and phosphorus interacted significantly for biomass production.
Observation Nitrogen was the dominant factor for Suaeda salsa production over two years.
Association Nitrogen and phosphorus had no significant interaction for SOC concentration, LOC concentration or SOC pool.
Observation CMI had a significant interaction at 0–20 cm depth.
Observation Nitrogen dominated variation in CMI.
Intervention effect Increasing nitrogen and phosphorus rates significantly reduced bulk density at 0–20 cm.
Observation Available nitrogen and phosphorus increased with higher fertilization rates.
Observation CMI increased at both sampled soil depths.
Association Above-ground and root biomass correlated positively with SOC and LOC in 2010 and 2011 across soil depths.
Intervention effect The 180 kg ha−1 N plus 105 kg ha−1 P treatment was superior to other treatments.
Observation Nitrogen and phosphorus fertilization produced a little short-term accumulation of SOC and LOC.
Recommendation The authors recommend nitrogen and phosphorus application to Suaeda salsa on coastal tidal lands for carbon sequestration, soil nutrition and quality.

Method / resourceobservedoriginal resultmeasured

Claim · model-written summary

The SOC 1 cDNA was obtained from Cymbidium tortisepalum.

Taxon: Cymbidium tortisepalumCymbidium tortisepalume0
Gene: SOC 1e0
Outcome: SOC 1 genee0

Not reportedValue

Verbatim

e0
“We obtained the SOC 1 gene from Cymbidium tortisepalum with phylogenetic analysis.”
✓ located verbatim in the source · abstract, characters 582–664

Title

Clone and Phylogenetic Analysis of a SOC 1 Gene of Cymbidium tortisepalum

Zhao Yin-h Seed 2015

Other claims from this paper (3)

Observation The full length was 912 bp.
Observation The open reading frame was 672 bp.
Observation The open reading frame encoded 223 amino acids.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Partial stover removal decreased SOC by 2.4 Mg SOC ha −1 at 0‐ to 30‐cm depth, averaged over N rates.

Taxon: CornZea mays subsp. mayse0
Treatment: PRe6
Outcome: SOCe6
Direction: decreasede6
Value: 2.4 Mg SOC ha −1e6
Qualifier: 0‐ to 30‐cm soil depthe6

Not reportedComparator

Verbatim

e0
“Corn ( Zea mays L.) stover removal”
✓ located verbatim in the source · abstract, characters 0–34

e6
“Averaged over N rates, PR removal decreased SOC 2.4 Mg SOC ha −1 , but FR increased SOC 6.8 Mg SOC ha −1 in 0‐ to 30‐cm soil depth”
✓ located verbatim in the source · abstract, characters 937–1067

Title

Stover Removal Affects No‐Till Irrigated Corn Yields, Soil Carbon, and Nitrogen

Ardell D. Halvorson; Catherine E. Stewart Agronomy Journal 2015. doi:10.2134/agronj15.0074

Other claims from this paper (13)

Intervention effect Stover removal increased early spring soil temperatures compared with full stover retention.
Intervention effect Stover removal enhanced early plant development compared with full stover retention.
Association Grain and stover yields increased with increasing N rate, and varied with stover treatment.
Association Plant N and C uptake increased with increasing N rate.
Intervention effect Averaged over N rate, grain yields were greater with partial stover removal than with full stover retention.
Intervention effect Averaged over N rate, stover yields were lower with partial stover removal than with full stover retention.
Association The C/N ratio of stover declined with increasing N rate.
Intervention effect Nitrogen fertilization did not significantly influence SOC and TSN stocks after 7 years.
Intervention effect Full stover retention increased SOC by 6.8 Mg SOC ha −1 at 0‐ to 30‐cm depth, averaged over N rates.
Intervention effect TSN stocks increased significantly with full stover retention (1176 kg N ha −1).
Intervention effect TSN stocks did not increase with partial stover removal (70 kg N ha −1).
Intervention effect Continued long-term residue removal will negate initial yield benefits from more rapid early spring plant development.
Intervention effect Partial stover removal as a cellulosic feedstock at ethanol-production levels would negatively impact soil quality in irrigated no-till corn in Colorado.

Associationobservedoriginal resultmeasured

Claim · model-written summary

The SOC stock ratio was negatively correlated with SOC in cropland and with fine soil percentage.

Taxon: willow and poplarPopulus Salixe1
Treatment: conversion from croplande1
Outcome: SOC stock ratioe2
Direction: negativelye2
Qualifier: SOC in CR and FS percentagee2

Verbatim

e1
“under SRWC willow and poplar after conversion from cropland”
✓ located verbatim in the source · abstract, characters 373–432

e2
“The SOC stock ratio was negatively correlated to SOC in CR and FS percentage”
✓ located verbatim in the source · abstract, characters 1527–1603

Title

Accumulation of soil organic carbon after cropland conversion to short‐rotation willow and poplar

Petros Georgiadis; Lars Vesterdal; Inge Stupak; et al. GCB Bioenergy 2017. doi:10.1111/gcbb.12416

Other claims from this paper (7)

Intervention effect Mean SOC stocks in SRWC were 1.7 times higher than in cropland in the top 5 cm of soil.
Intervention effect SOC stocks in the plough layer were higher in SRWC than in cropland by a factor of 1.2.
Intervention effect No change in SOC stocks was detectable for the 0–40 cm soil layer after conversion to SRWC.
Intervention effect No change in SOC stocks was detectable for the entire 0–100 cm soil layer after conversion to SRWC.
Association The SOC stock ratio of SRWC to cropland did not change significantly with time since conversion.
Association The SOC stock ratio tended to increase over time in the top 40 cm, without statistical significance.
Observation Willow and poplar did not differ significantly in SOC stock ratio at any depth.

“SOC”

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