Diagnosing Soil Health Through Ecological Risk Assessment in the Global South

Diagnosing soil health through ecological risk assessment (ERA) is a crucial approach to understanding soil environmental impacts and sustainability status. As soil health is a fundamental aspect of ecological systems influencing nutrient cycling, water filtration, and plant growth, comprehensive soil health assessment is a panacea to safeguarding our ecosystems and human well-being. Evaluating soil health through ERA aids in identifying potential hazards, determining pollutant levels, and quantifying ecological risks, enabling targeted remediation and conservation efforts. This chapter emphasizes the importance of data collection in ERA, highlighting its role in quantifying baseline conditions, identifying contaminants, assessing impacts, and informing management decisions. Additionally, discussions of models and indices used in ERA, tools to aid in quantifying soil quality, contamination risks, and overall ecological health were spelled out. Hence, comparison between qualitative and quantitative approaches to soil health assessment is paramount. While qualitative methods involve visual observations and plant growth assessments, quantitative approaches contain laboratory analyses of soil properties, pH, and electrical conductivity. The heart of ERA lies in risk characterization, where the exposure and toxicity data are integrated to evaluate the possibility and severity of damaging impacts on soil ecosystems. Importantly, ERA considers ecological relevance, addressing how contaminants affect soil biodiversity, habitat quality, and ecosystem services. ERA’s ability to inform evidence-based decisions in environmental management and regulatory frameworks is highlighted, underscoring its significance in protecting soil health and the environment at large. Diagnosing soil health through ERA is challenged by the complexity of soil ecosystems, the lack of standardized assessment methods, and the integration of multiple stressors like pollution, climate change, and land use changes. Potential solutions involve standardized protocols, long-term monitoring, and the analysis of soil microbiota using advanced methods like genomics. Furthermore, an integrated approach that engages farmers, scientists, policymakers, and other stakeholders is essential. Collaborative efforts are key to bridging gaps between research and practical applications, ensuring sustainable soil management practices and the protection of ecosystems, agriculture, and vital ecosystem services.