# Third-party attribution

## Published source table and derived records

Source: Padilla JT, Watts DW, Novak JM, Cerven V, Ippolito JA, Szogi AA, Johnson MG. 2023. Magnesium activation affects the properties and phosphate sorption capacity of poultry litter biochar. Biochar 5, 64. https://doi.org/10.1007/s42773-023-00263-5

The source article is distributed under [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/). The manuscript also identifies it as a US Government work. The supplied excerpt is Table 1 with its explanatory footnote. Changes here: the table was extracted from the surrounding publisher page, expanded to one formulation per row, normalized into JSON/CSV, screened descriptively, and replotted. Source attribution is retained; no endorsement by the authors or their institutions is implied.

## Dryad workbook

The public data archive is Padilla et al. (2023), [Dryad DOI 10.5061/dryad.pc866t1w7](https://doi.org/10.5061/dryad.pc866t1w7), version 10 October 2023. The supplied `Compiled_Data.xlsx` and original README are redistributed unchanged in `data/source/dryad` with SHA-256 provenance. Dryad datasets are available under CC0 under its [dataset terms](https://datadryad.org/terms). Source authorship and citation are retained. Derived changes: normalize the isotherm sheet into 540 paired observations, preserve negative values, compute descriptive counts and ranges, and replot the measurements. Other sheets are archived without silently correcting their labeling anomalies.

## Wang follow-up workbook

The separate follow-up workbook is Wang, Pengfei (2021), [Dryad DOI 10.5061/dryad.3xsj3txf4](https://doi.org/10.5061/dryad.3xsj3txf4), version 22 April 2021, available under CC0. The unchanged workbook and SHA-256 provenance are in `data/source/wang_2021`. Derived changes: extract 72 kinetic means and standard deviations with source-cell locations; preserve signed values and unknown replicate counts. Isotherms are archived without resolving their unit discrepancy. Associated article: Wang P, Zhi M, Cui G, Chu Z, Wang S (2021), *A comparative study on phosphate removal from water using Phragmites australis biochars loaded with different metal oxides*, Royal Society Open Science 8:201789, https://doi.org/10.1098/rsos.201789.

## GIGI engine

GIGI is a separate dependency, https://github.com/nurdymuny/gigi. Its source repository identifies the engine license as PolyForm Noncommercial 1.0.0. No GIGI executable, engine source, database snapshot, or grant of commercial rights is included here.

## New materials

Original code, tests, build scripts and workflow configuration are licensed under [PolyForm Noncommercial 1.0.0](LICENSES/PolyForm-Noncommercial-1.0.0.txt). Original manuscript text, documentation and figures, including their LaTeX/TikZ source, are licensed under [CC BY-NC 4.0](LICENSES/CC-BY-NC-4.0.txt). Copyright (c) 2026 Bee Rosa Davis. See [LICENSE](LICENSE) for scope and attribution. These terms do not impose new restrictions on third-party source measurements or other rights already available under their original licenses.