Climate-Smart Strategies for Soil Organic Carbon Management in Australian Agricultural Systems
Soil organic carbon (SOC) in Australian agricultural soils is driven by land use, total nitrogen (TN), climate, and soil properties, with pastures boosting surface POC in Mediterranean and semi-humid zones, while cropping systems enhance subsoil MAOC in humid areas. TN dominates most aridity-depth combinations, and climate- and mineral-driven controls vary, highlighting the need for climate-smart SOC management that tailors organic inputs, soil structure, and subsoil carbon strategies to local conditions.
Source: https://www.nature.com/articles/s41598-026-38349-2
Improving Digital Soil Organic Carbon Mapping Using Continuum-Removal Spectral Indices and Multivariate Geostatistics
This study demonstrated that spectral absorption-feature indices from soil hyperspectral reflectance, combined with silt fraction and topographic attributes, effectively capture soil organic carbon (SOC) spatial variability in a forested catchment. Incorporating these indices within a multivariate geostatistical framework improved SOC mapping accuracy over univariate kriging, revealing two distinct spatial scales and supporting their use as valuable covariates in heterogeneous landscapes.