Dr. Johannes Lehmann

Methodology focus

Liberty Hyde Bailey Professor at Cornell University. The foundational biochar scientist globally. His long-running work on biochar stability and residence time is the core scientific basis for any biochar crediting standard.

Trellison / LedgerWell intersection. Biochar crediting standard-setter.

Affiliation

Cornell University

Role

Professor

Axis

Nature-Based MRV

Tier

Tier 3

Selected publications

Numerous — Biochar stability, residence time, and agronomic effects. multiple venues.
Ongoing — Biochar standard-setting and MRV papers. multiple venues.

Alignment with proof packs

Their methodology / role	Proof-pack / Trellison fit
Biochar residence-time distribution	Proof-pack permanence modelling must account for Lehmann's distribution results
Biochar standards	Proof-pack biochar schema aligns with IBI/EBC standards Lehmann helped shape

Collaboration concepts

Concept 1

Biochar proof-pack schema paper with residence-time distribution

Formalise biochar-specific proof-pack fields.

Concept 2

Cornell / Trellison biochar MRV field study

Deployment-scale study with proof-pack instrumentation.

Concept 3

IBI standard alignment brief

Joint brief with International Biochar Initiative.

Outreach approach

Proposed opening message

Subject: A multi-scale MRV composition engine for your work

Dear Johannes Lehmann,

Your multi-method MRV framework for nature-based carbon removal has been a design reference for a per-tonne open-data verification instrument that Trellison Institute has been building. We call the artefact a proof pack.

I would welcome a 30-minute conversation to show you the current alpha. We are not asking for endorsement; we are asking for methodology critique and, if useful, an offer of alpha access for your active work. Independent negative evaluations would be published alongside positive ones.

A one-page methodology brief that maps your work to proof-pack schema fields — with gaps flagged honestly — is attached.

With respect,
Rob Stillwell
Director, Trellison Institute

What we do not ask for

Endorsement of Trellison, LedgerWell, DaedArch, or any affiliated entity.
Exclusivity or first-look rights on research findings.
Unpaid labour. Any advisor role is compensated with a modest honorarium and disclosed on the record.

Disclosure: Compiled from public sources through April 2026. Inclusion does not imply endorsement, affiliation, or reciprocal interest. Corrections: About.

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