Summary
This meta-analysis synthesises evidence from long-term field trials to demonstrate that organic fertilisation strengthens multiple concurrent pathways for soil mineral nitrogen production, as suggested by examination of nitrogen cycling mechanisms across diverse trial conditions. The work suggests that organic inputs enhance nitrogen availability through several interconnected soil biological and chemical processes rather than a single dominant mechanism. The findings contribute to understanding how organic farming systems sustain nitrogen supply for crop nutrition.
Regional applicability
The meta-analytic approach synthesises international trial data and should be transferable to United Kingdom organic farming contexts, though UK-specific factors such as soil type, climate, and organic amendment availability would influence the magnitude of effects observed in practice.
Key measures
Soil mineral nitrogen concentrations, rates of nitrification, ammonification, and other nitrogen transformation processes as reported across multiple long-term field experiments
Outcomes reported
The study synthesised long-term field trial data to examine how organic fertilisation affects multiple soil processes involved in mineral nitrogen production. The analysis quantified changes in soil nitrogen availability and the biochemical pathways through which organic inputs enhance nitrogen cycling.
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