Adapting and Verifying the Liming Index for Enhanced Rock Weathering Minerals as an Alternative Liming Approach

Francisco S.M. Araujo; Andrea G.M. Chacon; Raphael F. Porto; Jaime P.L. Cavalcante; Yi Wai Chiang; Rafael M. Santos

doi:10.20944/preprints202409.2459.v1

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preprints.org > environmental and earth sciences > soil science > doi: 10.20944/preprints202409.2459.v1

Preprint Article Version 1 This version is not peer-reviewed

Adapting and Verifying the Liming Index for Enhanced Rock Weathering Minerals as an Alternative Liming Approach

Francisco S.M. Araujo

Andrea G.M. Chacon

Raphael F. Porto

Jaime P.L. Cavalcante

Yi Wai Chiang

Rafael M. Santos

Version 1 : Received: 30 September 2024 / Approved: 30 September 2024 / Online: 1 October 2024 (03:33:39 CEST)

How to cite: Araujo, F. S.; Chacon, A. G.; Porto, R. F.; Cavalcante, J. P.; Chiang, Y. W.; Santos, R. M. Adapting and Verifying the Liming Index for Enhanced Rock Weathering Minerals as an Alternative Liming Approach. Preprints 2024, 2024092459. https://doi.org/10.20944/preprints202409.2459.v1 Araujo, F. S.; Chacon, A. G.; Porto, R. F.; Cavalcante, J. P.; Chiang, Y. W.; Santos, R. M. Adapting and Verifying the Liming Index for Enhanced Rock Weathering Minerals as an Alternative Liming Approach. Preprints 2024, 2024092459. https://doi.org/10.20944/preprints202409.2459.v1

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MDPI and ACS Style

Araujo, F. S.; Chacon, A. G.; Porto, R. F.; Cavalcante, J. P.; Chiang, Y. W.; Santos, R. M. Adapting and Verifying the Liming Index for Enhanced Rock Weathering Minerals as an Alternative Liming Approach. Preprints 2024, 2024092459. https://doi.org/10.20944/preprints202409.2459.v1

APA Style

Araujo, F. S., Chacon, A. G., Porto, R. F., Cavalcante, J. P., Chiang, Y. W., & Santos, R. M. (2024). Adapting and Verifying the Liming Index for Enhanced Rock Weathering Minerals as an Alternative Liming Approach. Preprints. https://doi.org/10.20944/preprints202409.2459.v1

Chicago/Turabian Style

Araujo, F. S., Yi Wai Chiang and Rafael M. Santos. 2024 "Adapting and Verifying the Liming Index for Enhanced Rock Weathering Minerals as an Alternative Liming Approach" Preprints. https://doi.org/10.20944/preprints202409.2459.v1

Abstract

Acidic soils limit plant nutrient availability, leading to deficiencies and reduced crop yields. Agricultural liming agents address these issues and are crucial for deploying silicate amendments used in enhanced rock weathering (ERW) for carbon sequestration and emission reduction. Grower recommendations for liming agents are based on the liming index (LI), which combines the neutralizing value (NV) and fineness rating (FR) to predict a mineral’s acidity neutralization relative to pure calcite. However, the LI was originally developed for carbonate minerals, and its applicability to silicates remains uncertain, with studies often yielding inconclusive results on soil carbon and liming efficiency. This study aims to evaluate the liming efficiency of silicates. We determined the LI of five candidate ERW minerals (basalt, olivine, wollastonite, kimberlite, and montmorillonite) and compared them to pure calcite. Post-NV acid digestion, we characterized the minerals and soils, applying nonparametric statistical tests (Wilcoxon, Kendall) to correlate liming results with LI, dosage, and amendment methods. We developed an empirical model incorporating mineralogy and kinetics to explain silicate behavior in liming, considering soil, climate, and crop factors.

Keywords

Liming; ERW; agricultural index; acid digestion; climate change; sustainable agriculture

Subject

Environmental and Earth Sciences, Soil Science

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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