Soil Organic Carbon (SOC)
Benchmark Value
Scoring Curve
This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context. The scoring engine uses 2 benchmarks together — the OptimalRange form drives the primary score, while 1 guard(s) constrain the result.
Contributing Benchmarks
Evidence & Context
Synthesising these data points, the optimal range for SOC in pastures on Ferrosol soils within this biome is defined as 3.5% to 6.0%.
Soil Organic Carbon (SOC) content in soil.
This benchmark defines the optimal functional range of soil organic carbon for pastures on Ferrosol soils in the Tropical & Subtropical Maritime Islands biome under livestock grazing and pasture land use, representing high ecological health and sustainable productivity.
Range anchored by the optimal value from Norfolk Island assessments and consistent with data from analogous high-rainfall pasture systems.
Sources (2)
Soil Carbon Sequestration Potential: A review for Australian agriculture - MLA
View Source
Coexistence of shrubs and grass in a semi-arid landscape: a case study of mulga (Acacia aneura, Mimosaceae) shrublands embedded in fire-prone spinifex (Triodia pungens, Poaceae) hummock grasslands - CSIRO PUBLISHING | Australian Journal of Botany
View SourceSupporting Sources (4)
Additional references from the underlying research that informed this benchmark.
Is there a critical level of organic matter in the agricultural soils of temperate regions: A review | Request PDF - ResearchGate
View SourceNorfolk Island Environmental Assessment
View SourceSparling, G. P. (1992). Ratio of microbial biomass carbon to soil organic carbon as a sensitive indicator of changes in soil organic matter. Australian Journal of Soil Research, 30(2), 195-207.
View SourceExploring Soil Carbon in the Mallee - Soils Connect, accessed July 6, 2025
View Source