Impact of Organic Agriculture on Soil Quality and Ecosystem Services: A Review

Abstract

The impacts of organic agriculture on soil quality and associated ecosystem services, synthesising evidence from long-term field trials, meta-analyses, and empirical studies. Organic agriculture is increasingly recognised as a sustainable alternative to conventional farming, offering multiple environmental and agronomic benefits through ecologically based management practices. Organic systems enhance soil physical properties by improving aggregate stability, reducing bulk density, and increasing water infiltration capacity. Chemically, they promote higher levels of soil organic matter, balanced pH, and more efficient nutrient cycling via compost application and biological nitrogen fixation. Biologically, organic soils exhibit significantly greater microbial biomass, enzymatic activity, and faunal diversity, supporting key functions such as carbon sequestration, nutrient mineralization, and pest suppression. These soil improvements contribute to broader ecosystem services, including sustainable food production, climate regulation, water purification, and biodiversity enhancement. Although organic farming generally results in lower yields averaging 10–20% less than conventional systems trade-offs are mitigated by greater energy efficiency, reduced environmental externalities, and improved long-term soil fertility. Barriers to widespread adoption include yield variability, certification complexity, and region-specific performance constraints. The transition period is particularly critical, with initial declines in productivity and biological activity before system stabilization. Expanded longitudinal studies, region-specific trials, integration of advanced tools such as remote sensing and metagenomics, and development of policy mechanisms that support ecosystem-based farming. A multidimensional evaluation that incorporates environmental, economic, and social indicators is essential to accurately assess the role of organic systems in meeting global sustainability targets. The evidence indicates that organic agriculture has the potential to restore degraded soils, enhance ecosystem functioning, and contribute meaningfully to climate-smart and resilient food systems when supported by science-driven policy and adaptive management strategies. To address the challenges and realize the full potential of organic agriculture, future efforts must focus on long-term, data-driven research and technological integration.