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A Plate Competition Assay As a Quick Preliminary Assessment of Disease Suppression

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Published on: October 28, 2018

A Correlation-Based Approach for Predicting Humic Substance Bioactivity from Direct Compost Characterization.

Ana Catarina Silva^1,2, Pedro Rocha¹, Patrícia Valderrama³

¹Department of Chemistry, Centre of Chemistry, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal.

Molecules (Basel, Switzerland)

|April 26, 2025

Summary

This summary is machine-generated.

Direct compost analysis effectively predicts humic substance quality and agricultural value. This simplifies compost assessment, reducing the need for extensive lab work and improving soil amendment strategies.

Keywords:

bioactivity compost characterization compost maturity compost quality index correlation analysis humic-like substances sustainable agriculture thermal stability

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Quantification of Humic and Fulvic Acids in Humate Ores, DOC, Humified Materials and Humic Substance-Containing Commercial Products

Quantification of Humic and Fulvic Acids in Humate Ores, DOC, Humified Materials and Humic Substance-Containing Commercial Products

Published on: March 18, 2022

Area of Science:

Agricultural Science
Soil Science
Environmental Chemistry

Background:

Efficient compost quality assessment is crucial for agricultural applications and soil health.
Current methods for analyzing humic substances in compost are often labor-intensive and time-consuming.
Understanding the link between bulk compost properties and humic substance characteristics is key to developing faster evaluation techniques.

Purpose of the Study:

To establish correlations between bulk compost physicochemical properties and the characteristics of humic substance-like (HS-L) fractions (fulvic acid-like and humic acid-like).
To identify key compost parameters that can reliably predict humic substance composition, bioactivity, and agronomic potential.
To develop a simplified and cost-effective compost quality assessment framework.

Main Methods:

Correlation analysis was used to link bulk compost properties with compost extract characteristics.
Elemental analysis, UV-vis, ATR-FTIR, 1H-NMR spectroscopy, and TGA-DSC thermal analysis were performed on compost extracts.
Physicochemical properties such as oxidation state (C/C) and cation exchange capacity (CEC) of bulk compost were measured.

Main Results:

Strong correlations were identified between bulk compost oxidation state, CEC, thermal stability, and the structural features of HS-L fractions.
Direct characterization of compost effectively predicts the reactivity and agronomic potential of its humic substances.
The findings support the Compost Quality Index (CQI) and highlight the role of humic substances in soil fertility and nutrient retention.

Conclusions:

Direct compost analysis offers a simplified and robust method for assessing compost quality and predicting humic substance bioactivity.
This approach reduces reliance on complex extraction procedures, enabling more efficient and cost-effective compost evaluation.
The study provides a framework for optimizing compost application in agriculture and soil improvement initiatives.