Search claims · PlantClaims

Associationobservedoriginal resultmeasured

Claim · model-written summary

Faster soil organic matter decomposition was associated with lower soil C:N ratio.

Outcome: SOM decompositione0
Direction: Fastere0
Qualifier: lower soil C:N ratioe0
Setting: soile0

Not reportedTaxon

Verbatim

e0
“Faster SOM decomposition was associated with lower soil C:N ratio”
✓ located verbatim in the source · abstract, characters 589–654

Title

Intercropping affects the rate of decomposition of soil organic matter and root litter

Wen-Feng Cong; Ellis Hoffland; Long Li; et al. Plant and Soil 2015. doi:10.1007/s11104-015-2433-5

Other claims from this paper (6)

Intervention effect Intercrop soil organic matter decomposed faster than monocrop soil organic matter.
Observation Compost decomposed at similar rates in different soils.
Observation Maize and wheat root litter mixtures decomposed as expected from individual litters.
Observation Maize and faba bean litter mixture decomposed faster than expected in laboratory and field.
Intervention effect Root litter decomposed slowly in maize/wheat intercrop soil in the laboratory.
Observation The root litter decomposition difference was absent in the field.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Reducing C/N raised the organic carbon decomposition rate of various organic materials above that without adjustment.

Taxon: corn and soybeanGlycine max Zea mays subsp. mayse1
Treatment: reducing C/Ne2
Outcome: organic carbon decomposition ratee2
Direction: highere2
Comparator: no adjustinge2

Verbatim

e1
“corn and soybean stalks of organic carbon under different incorporation methods into the field”
✓ located verbatim in the source · abstract, characters 94–188

e2
“After reducing C/N, the organic carbon decomposition rate of various organic materials was higher than that of no adjusting”
✓ located after whitespace/quote normalisation · abstract, characters 1209–1331

Title

Study on organic carbon decomposition regularity of organic materials in different incorporation methods

Jiuming Zhang 2010

Other claims from this paper (10)

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Nr- and warming-induced changes in roots and AMF stimulated organic C decomposition.

Taxon: rootse0
Treatment: Nr- and warminge0
Interactor: AMFe0symbiont
Outcome: organic C decompositione0
Direction: stimulatinge0

Not reportedComparator

Verbatim

e0
“Nr- and warming-induced changes in roots and AMF reduced C input belowground, and mineral-associated organic C and microbial necromass in soil, while stimulating organic C decomposition”
✓ located verbatim in the source · abstract, characters 571–756

Title

Root traits and mycorrhizal fungi mediate reactive N and warming impacts on soil organic carbon

Yunpeng Qiu; Yunfeng Zhao; Bianbian Wang; et al. Nature Communications 2026. doi:10.1038/s41467-026-69301-7

Other claims from this paper (5)

Mechanism Nr input and simulated warming altered soil organic carbon by reshaping plant communities and inducing tradeoffs among fine-root traits and AMF communities in a semi-arid grassland.
Intervention effect Nr- and warming-induced changes in roots and AMF reduced belowground C input, as shown by 13C tracing.
Intervention effect Nr- and warming-induced changes in roots and AMF reduced mineral-associated organic C and microbial necromass in soil.
Intervention effect Nr input increased soil N:P ratios.
Intervention effect Nr input shifted AMF communities toward taxa with finer extraradical hyphae.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Soyabean could not maintain soil organic carbon at 70% annual decomposition.

Taxon: soyabeane0
Outcome: soil organic C (SOC)e0
Qualifier: annual C input decomposition rate of 70%e0

Not reportedDirection

Verbatim

e0
“soyabean was not able to maintain soil organic C (SOC) at an annual C input decomposition rate of 70%”
✓ located verbatim in the source · abstract, characters 552–653

Title

Organic Carbon Inputs by Soyabean in the West African Moist Savanna

I. J. Ogoke; R. J. Carsky; A. O. Togun; et al. Biological Agriculture & Horticulture 2002. doi:10.1080/01448765.2002.9754957

Other claims from this paper (10)

Observation Late varieties gave greater root and litter carbon input.
Observation Late varieties responded more strongly to phosphorus.
Intervention effect Phosphorus increased root and litter carbon by 44–49%.
Intervention effect Phosphorus increased total carbon input by 45–46%.
Observation Root and litter carbon formed 60% of total input.
Intervention effect Phosphorus supplied 105–107% of carbon needed to maintain soil organic carbon under 50% decomposition.
Observation Increasing soil organic carbon by 1 g kg−1 was estimated to require 12.2–14.2 Mg ha−1 carbon.
Observation Varietal carbon input represented 7–22% of the required input.
Intervention effect Phosphorus reduced the carbon required to increase soil organic carbon by only 4–10%.
Observation Soyabean carbon input remained minimal despite greater duration and phosphorus.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Cover crops were interpreted to increase soil microbial biomass through decomposition of organic C.

Taxon: tomatoSolanum lycopersicumt0
Treatment: cover cropse0
Outcome: soil microbiological biomasse0
Qualifier: decomposition of organic Ce0

Verbatim

e0
“cover crops increase soil microbiological biomass through the decomposition of organic C”
✓ located verbatim in the source · abstract, characters 1651–1739

t0
“Tomato”
✓ located verbatim in the source · title, characters 91–97

Title

Changes of Soil Microbial Biomass Carbon and Nitrogen with Cover Crops and Irrigation in a Tomato Field

Q. R. Wang; Y. C. Li; W. Klassen Journal of Plant Nutrition 2007. doi:10.1080/01904160701209410

Other claims from this paper (14)

Intervention effect Sorghum sudangrass increased soil microbial biomass C by 68.9%.
Intervention effect Cowpea increased soil microbial biomass C by 89.8%.
Intervention effect Sunn hemp increased soil microbial biomass C by 116.8%.
Intervention effect Velvetbean increased soil microbial biomass C by 137.7%.
Intervention effect Sorghum sudangrass increased soil microbial N by 58.3%.
Intervention effect Cowpea increased soil microbial N by 100.0%.
Intervention effect Sunn hemp increased soil microbial N by 297.3%.
Intervention effect Velvetbean increased soil microbial N by 261.3%.
Intervention effect Cowpea did not produce significantly more soil microbial C and N than sorghum sudangrass.
Intervention effect Different irrigation rates did not significantly alter microbial N or C.
Association Soil microbial biomass was related to cover crop and soil N concentration and inversely to C:N ratio.
Association Tomato plant biomass correlated with soil microbial N and inversely with soil C:N ratio.
Association Tomato fruit yield correlated with soil microbial N and inversely with soil C:N ratio.
Mechanism Legumes were interpreted as more effective because of more N and lower C:N ratios.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Litter decomposition quality was positively correlated with organic C content of the litter.

Taxon: Leymus chinensis and Phragmites communisPhragmites australisLeymus chinensise1
Compound: organic Ce6
Outcome: litter decomposition qualitye6
Direction: positivelye6

Verbatim

e1
“focused on Leymus chinensis and Phragmites communis litter in Songnen grassland”
✓ located verbatim in the source · abstract, characters 12–91

e6
“the relatedness of litter decomposition quality with organic C content was positively positive correlation”
✓ located verbatim in the source · abstract, characters 1122–1228

Title

Decomposition of Leymus chinensis and Phragmites communis litter responses to simulated warming and nitrogen application in Songnen grassland

Jixun Guo Journal of Northeast Normal University 2012

Other claims from this paper (12)

Mechanismhypothesisoriginal resultbasis n/a

Claim · model-written summary

The authors propose enhanced decomposition and oxidation of soil organic C during initial tillage as an explanation for the absent C response.

Taxon: Mixed-Grass Prairiet0
Treatment: mechanical renovation treatmentse0
Outcome: lack of organic C responsee0
Qualifier: enhanced decomposition and oxidation of soil organic Ce0

Verbatim

e0
“The “tillage effect” of the mechanical renovation treatments may account for the lack of organic C response because of enhanced decomposition and oxidation of soil organic C during initial treatment implementation”
✓ located verbatim in the source · abstract, characters 1062–1275

t0
“Mixed-Grass Prairie”
✓ located verbatim in the source · title, characters 48–67

Title

Long-Term Effects of Mechanical Renovation of a Mixed-Grass Prairie: II. Carbon and Nitrogen Balance

D. L. MIYAMOTO; G. E. SCHUMAN; R. A. OLSON Arid Land Research and Management 2004. doi:10.1080/15324980490280807

Other claims from this paper (8)

Intervention effect Mechanical renovation increased prairie forage production.
Intervention effect Mechanical renovation increased livestock carrying capacities.
Intervention effect Single ripping increased soil profile N mass over the untreated control after 21 years.
Intervention effect Double ripping increased soil profile N mass over the untreated control after 21 years.
Intervention effect Single ripped plots had more total ecosystem N than their controls.
Intervention effect Double ripped plots had more total ecosystem N than their controls.
Intervention effect Single ripping had no significant effect on soil or ecosystem organic C mass or distribution.
Intervention effect Double ripping had no significant effect on soil or ecosystem organic C mass or distribution.

Observationauthor interpretationoriginal resultmeasured

Claim · model-written summary

The C-content decrease appeared to correspond to dilution rather than increased organic matter decomposition.

Outcome: C‐contente0
Direction: decreasee0
Qualifier: corresponds with the dilutione0

Not reportedTaxon

Verbatim

e0
“It seems that there is no increased decomposition of organic substance, the decrease of the C‐content corresponds with the dilution which took place.”
✓ located verbatim in the source · abstract, characters 362–511

Title

Der Einfluß der Primärlößmelioration auf die K‐Fixierung, weitere chemische Eigenschaften und den Ertrag von Parabraunerden

H. Aeppli; T. Harrach Zeitschrift für Pflanzenernährung und Bodenkunde 1971. doi:10.1002/jpln.19711300202

Other claims from this paper (7)

Intervention effect Calcareous loess increased topsoil pH, carbonate and calcium saturation.
Intervention effect Calcareous loess decreased topsoil H + Al saturation.
Observation The subsoil had no change over two years.
Intervention effect Calcareous loess decreased exchangeable K in the A p horizon.
Intervention effect Calcareous loess considerably increased K fixation in the A p horizon.
Intervention effect Loess amelioration decreased yield on nutrient-poor soil.
Intervention effect Loess amelioration increased yield on well supplied soil.

Observationobservedreview summarybasis n/a

Claim · model-written summary

Decomposition of soil organic matter, non-enzymatic mechanisms and priming effects, which enhance C and N cycling, are the major ways ECM fungi regulate nutrients.

Outcome: C and N cyclinge0
Qualifier: Decomposition of soil organic matter, non-enzymatic mechanisms, and priming effectse0

Not reportedTaxon

Verbatim

e0
“Decomposition of soil organic matter, non-enzymatic mechanisms, and priming effects, which enhance the C and N cycling, are the major regulation methods of ECM fungi for nutrients”
✓ located verbatim in the source · abstract, characters 978–1157

Title

Ectomycorrhizal fungal symbiosis on plant nutrient acquisition in tropical ecosystems

Aseni Navoda Ediriweera; Wenhua Lu; Jesus Perez Moreno; et al. New Zealand Journal of Botany 2025. doi:10.1080/0028825x.2025.2519569

Other claims from this paper (6)

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Changing disturbance intensity accelerated decomposition of old particulate organic C.

Taxon: grasslande0
Treatment: Changing disturbance intensitye1
Outcome: accelerated decomposition of old particulate organic Ce3
Direction: acceleratede3
Qualifier: <6 monthse3

Not reportedComparator

Verbatim

e0
“mesocosm experiment with grassland monoliths”
✓ located verbatim in the source · abstract, characters 583–627

e1
“Changing disturbance intensity led to a cascade of events”
✓ located verbatim in the source · abstract, characters 1106–1163

e3
“Those changes led to a decrease of soil fungi, a proliferation of Gram(+) bacteria and accelerated decomposition of old particulate organic C (<6 months)”
✓ located verbatim in the source · abstract, characters 1321–1474

Title

Grazing triggers soil carbon loss by altering plant roots and their control on soil microbial community

Katja Klumpp; Sébastien Fontaine; Eléonore Attard; et al. Journal of Ecology 2009. doi:10.1111/j.1365-2745.2009.01549.x

Other claims from this paper (10)

Intervention effect After the shift to high disturbance, photosynthesis decreased.
Intervention effect After the shift to high disturbance, root biomass declined.
Intervention effect After the shift to high disturbance, plant community structure changed 1.5 months later.
Intervention effect Changing disturbance intensity decreased soil fungi.
Intervention effect Changing disturbance intensity led to a proliferation of Gram(+) bacteria.
Intervention effect Accelerated decomposition released plant available nitrogen.
Intervention effect Changing disturbance intensity decreased soil C storage.
Mechanism Intensified grazing triggers Gram(+) bacteria proliferation and faster decomposition by reducing roots adapted to low disturbance.
Mechanism Plant communities control decomposition through the activity of their living roots.
Mechanism Grazing impacts soil carbon storage by altering plant roots and their control on the soil microbial community.

“organic C decomposition”

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