Fungal:Bacterial Ratio
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 14 benchmarks together — the OptimalRange form drives the primary score, while 13 guard(s) constrain the result.
Evidence & Context
Based on the synthesis of evidence presented in Table 1, the F:B ratio of 0.20 is proposed as the benchmark for the best available condition.
Fungal:Bacterial ratio measured by PLFA analysis representing the relative biomass of fungi to bacteria in soil.
This benchmark represents the Fungal:Bacterial ratio in soil under a native Acacia chisholmii stand in an Australian arid zone, indicating a high-functioning ecological state associated with soil health.
It originates from a real-world, high-functioning ecological state within the target Australian arid biome and is associated with higher soil carbon, nitrogen, and microbial activity.
Sources (1)
Biochemical properties of highly mineralised and infertile soil modified by acacia and spinifex plants in northwest Queensland, Australia | Request PDF - ResearchGate
View SourceSupporting Sources (2)
Additional references from the underlying research that informed this benchmark.
(PDF) Soil community changes during secondary succession to naturalized grasslands, accessed August 9, 2025,
View SourceSoil microbial biomass in semi-arid communal sandy rangelands in the western Bophirima District, South Africa - ResearchGate
View Source