Phosphate stable oxygen isotope variability within a temperate agricultural soil

Summary

This field-based investigation examined how phosphate oxygen isotope ratios vary spatially within an arable soil and whether such variation can serve as a tracer of past management practices. The authors sampled a field with a documented history of north-south management division that had been removed four years prior, allowing assessment of whether isotopic signatures persist as markers of legacy management or recover to homogeneous baseline conditions. The work contributes evidence on the utility of stable isotope analysis for characterising soil process history and management legacies in temperate arable systems.

UK applicability

Given the field location in a temperate arable context typical of United Kingdom agriculture, the findings directly apply to UK farming systems and management practices. The methodological approach using phosphate oxygen isotope tracers could inform UK soil monitoring and historical management assessment protocols, particularly for fields with documented management changes.

Key measures

Phosphate stable oxygen isotope ratios (δ18O-PO4) across soil depth and spatial location; assessment of isotopic variability relative to historical field management divisions

Outcomes reported

The study characterised spatial variability in phosphate stable oxygen isotope composition within a temperate agricultural soil and examined whether isotopic patterns reflect underlying soil heterogeneity or historical field management practices. The research assessed the persistence or recovery of isotopic signatures four years after removal of a long-standing north-south management division.

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