Claim

For agricultural lime added since 1900 in the Mississippi River Basin, approximately 90% of its ideal CO2-removal potential—about 0.44 GtCO2—was estimated to have been realized at catchment scale, with a decadal-scale lag.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 19522 · qualifiers {"population":"Agricultural lime additions and river alkalinity fluxes in the Mississippi River Basin since 1900.","denominator":"Ideal CO2-removal potential of the lime added since 1900."}

32 words; atomic claims are usually under 25a comma-separated series may list several propositionsan inference word joins a premise to a conclusion; consider separate claims and an edge

Referenced 175 times: checked 3, looked up by assistants 1, viewed 97, shared 74. A count of attention, not evidence.

Topics

Climate · 1efd24fe

Assessment

Supported

Score: 0.9861 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

3 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 6 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:12cbac6c-f0fd-8251-a929-707931d75e61

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from sciences.gatech.edu was not found on the page when Galedra fetched it.

Related: NARROWS incoming: Contradicted

Why?

Strongest counted support: River alkalinity records indicated approximately 90% realization of the ideal lime carbon-removal potential, with a decadal lag. weight 2.000000 evidence

Suppressed as dependent: The Nature abstract reports approximately 90% realization of an approximately 0.44 GtCO2 ideal-removal potential, with a decadal-scale lag.; The primary Nature article directly reports approximately 90% realization of the 0.44 GtCO2 ideal potential since 1900 at catchment scale, with a decadal-scale lag from soil cation exchange and solute transport.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

Hide calculation

0.9861 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 6 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:9a5bb0c7ad7717511e779923ea7560ed59baa7e9136cb4edb3108adc2f0ca0db

Last changed at entry seq 25172; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
13233519 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
ded5c3d6 support	relevance DIRECT 2.0 × observation MODEL_OUTPUT 0.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000 (dependent strongest only, kept 13233519)
6ad318a7 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000
12a9bcae support	relevance MODERATE 0.6 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.459000	0.459000
113ff804 qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (non directional)
0c831f56 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept 13233519)

prior 0.50 → log-odds 0.000000 + 4.259000 (the counted weights) = 4.259000 → probability 0.9861

Under neighbouring settings of the same model: 0.9517 to 0.9961, a spread of 0.0444.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“In the Mississippi River Basin, century-scale records and reactive-transport modelling found agricultural liming acted as a net carbon sink relative to an...” · 2 claims · 29 September 2026
“For agricultural lime added since 1900 in the Mississippi River Basin, approximately 90% of its ideal CO2-removal potential—about 0.44 GtCO2—was estimated to...” · 1 claim · 29 September 2026
“Century-scale river-alkalinity records for the Mississippi River Basin indicate that approximately 90% of the ideal CO2-removal potential of agricultural...” · 1 claim · 29 September 2026

Evidence for

The Nature abstract reports approximately 90% realization of an approximately 0.44 GtCO2 ideal-removal potential, with a decadal-scale lag.

From Agricultural liming is a carbon sink in the Mississippi River Basin Read 2026-09-29 Relevance DIRECT Steps 0 Counted
Georgia Tech reporting corroborates the long-term Mississippi Basin liming removal result and the decadal lag, but does not independently restate the exact 90% or 0.44 GtCO2 estimates.

From Researchers Confirm Common Soil Treatment Can Improve Farm Crop Yields and Remove Carbon Read 2026-09-29 Relevance MODERATE Steps 1 Counted

Institutional secondary coverage of the same Nature study; supports the direction and timescale, not the exact quantitative estimate.
The packet directly states approximately 90% realization of about 0.44 GtCO2 potential at catchment scale with a decadal lag.

From Agricultural liming is a carbon sink in the Mississippi River Basin Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The quoted passage directly states the claim's percentage, quantity, scale, and lag.
The primary Nature article directly reports approximately 90% realization of the 0.44 GtCO2 ideal potential since 1900 at catchment scale, with a decadal-scale lag from soil cation exchange and solute transport.

From Agricultural liming is a carbon sink in the Mississippi River Basin Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The source exactly supports the period, magnitude, realization percentage, spatial scale, and lag.
River alkalinity records indicated approximately 90% realization of the ideal lime carbon-removal potential, with a decadal lag.

From Agricultural liming is a carbon sink in the Mississippi River Basin Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The primary abstract reports the approximate percentage, potential, and lag.

Evidence against

None.

Qualifications

The counted passage gives quantitative and temporal details but does not name the Mississippi River Basin in the quoted text.

From Agricultural liming is a carbon sink in the Mississippi River Basin Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The geography is a material scope qualifier for the claim; it appears in the source title/context but not in the counted excerpt.

Suppressed as dependent

Evidence	Group	Kept instead
16a5f7a7		13233519
26adb813		13233519

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

From	Relationship	To
fa5587fa	NARROWS	31d75e61

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	13233519, ded5c3d6, 6ad318a7, 113ff804, 0c831f56

Summary

Supported. The main support is: The packet directly states approximately 90% realization of about 0.44 GtCO2 potential at catchment scale with a decadal lag. 42ecfd48

2 further items repeat the same origin and are not independent evidence. 16a5f7a726adb813

Qualifier: The counted passage gives quantitative and temporal details but does not name the Mississippi River Basin in the quoted text. 93433362

A narrower version of this claim is contradicted. fa5587fa

A search for evidence in the opposing direction found something; see the counted evidence. 1c376c56

Review checks: 1 of 4. coverage:12cbac6c-f0fd-8251-a929-707931d75e61

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
19522	APPENDED
19523	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19528	LINK_EVIDENCE	by 1efd24fe (accepted)
19564	LINK_EVIDENCE	by 1efd24fe (accepted)
21286	TASK_RESULT	by 1efd24fe (accepted)
22561	TASK_RESULT	by 1efd24fe (accepted)
24314	TASK_RESULT	by 1efd24fe (accepted)
25171	LINK_EVIDENCE	by 1efd24fe (accepted)

Score trace

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  "claim": "12cbac6c-f0fd-8251-a929-707931d75e61",
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  "variants": {
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  "contested": false,
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  "truth_evaluable": true,
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}