Fungal:Bacterial Ratio

AUS-TDG-CON-SFB General Moderate confidence

Benchmark Value

0.75 ratio
Direction: Higher is desirable ↑
Form: Point

Scoring Curve

Scoring curve unavailable

The scoring engine could not generate a curve for this benchmark context. The primary form is Point, but the benchmark data may be missing required fields (e.g., optimal range bounds for an OptimalRange benchmark). This is typically a data quality issue in the benchmark pipeline.

Evidence & Context

a high proportion of bacteria with a ratio of 0.75:1 fungi to bacteria has been considered ideal (based on colony-forming units or CFUs).

Metric Definition:

Culture-dependent colony-forming unit (CFU) ratio of active fungi to bacteria in topsoil.

Benchmark Definition:

Ideal fungal to bacterial ratio point reference for managed pasture and native grassland soils based on CFU methods.

Justification:

Managed pasture and native grassland soils function as close ecological analogues; this value provides a robust baseline for traditional culture-dependent plate counts.

Sources (1)

Preview of Different responses of soil fungal and bacterial communities to nitrogen addition in a forest grassland ecotone - Frontiers
Different responses of soil fungal and bacterial communities to nitrogen addition in a forest grassland ecotone - Frontiers Journal

Soil microbiology factsheet

View Source

Supporting Sources (7)

Additional references from the underlying research that informed this benchmark.

Preview of Fungal/bacterial ratios in grasslands with contrasting nitrogen ...
Fungal/bacterial ratios in grasslands with contrasting nitrogen ...
Direct Evidence

Fungal/bacterial ratios in grasslands with contrasting nitrogen ...

View Source
Preview of Fungal/bacterial ratios in grasslands with contrasting nitrogen management - ResearchGate, accessed July 18, 2025
Fungal/bacterial ratios in grasslands with contrasting nitrogen management - ResearchGate, accessed July 18, 2025
Direct Evidence GreyLiterature

Fungal/bacterial ratios in grasslands with contrasting nitrogen management - ResearchGate

View Source
Preview of Fungus and bacteria OH MY!! F:B Ratios explained - Mass Hydroponics
Fungus and bacteria OH MY!! F:B Ratios explained - Mass Hydroponics
Contextual Support GreyLiterature

Soil Fungal:Bacterial Ratios Are Linked to Altered Carbon Cycling - PMC - PubMed Central, accessed July 21, 2025

View Source
Preview of Global biogeography of fungal and bacterial biomass carbon in topsoil
Global biogeography of fungal and bacterial biomass carbon in topsoil
Irrelevant

Biogeographic patterns of soil bacterial and fungal biomass C and their ratios across major biomes

View Source
Preview of Response of soil microbial functionality and soil properties to ...
Response of soil microbial functionality and soil properties to ...
Contextual Support Journal

Pastures to woodlands: Changes in soil microbial communities and carbon following reforestation | Request PDF - ResearchGate

View Source
Preview of Role of Soil Fungus | Ohioline - The Ohio State University, accessed on June 5, 2025
Role of Soil Fungus | Ohioline - The Ohio State University, accessed on June 5, 2025
Contextual Support GreyLiterature

Role of Soil Fungus | Ohioline - The Ohio State University, accessed on June 7, 2025,

View Source
Preview of Unlocking the power of microbes to enhance the soil
Unlocking the power of microbes to enhance the soil
Contextual Support GreyLiterature

Unlocking the power of microbes to enhance the soil

View Source

Context

  • Region Australia
  • Biome Temperate Dry Woodlands & Native Grasslands
  • Land Use Conservation / Protected Natural Areas
  • Assessment Agricultural Biodiversity Target
  • Vegetation Grassland
  • Evidence Type HealthyOperationalRange

Lifecycle

  • Status Active
  • Version 1
  • Effective From 19 Jun 2026

Notes

Culture-dependent CFU methods systematically underestimate non-culturable fungal and bacterial populations, resulting in lower reported F:B values compared to molecular techniques.