Basal Area
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 16 benchmarks together — the OptimalRange form drives the primary score, while 15 guard(s) constrain the result.
Contributing Benchmarks
Evidence & Context
Proposed Lower Critical Threshold: < 5 m²/ha
Basal area, defined as the cross-sectional area of tree stems at breast height per unit of land (e.g., m²/ha)
The lower critical threshold below which basal area is insufficient to support functional agroecosystem services in tropical and subtropical maritime island agricultural crop production systems.
Below 5 m²/ha, tree density is too low to provide significant ecosystem services or form a functional agroecosystem, likely falling below the 10% canopy cover definition of a forest.
Sources (2)
UN Food and Agriculture Organization (FAO) definition of forest canopy cover
View SourceStudy in a South Indian agricultural landscape on vegetation cover and crop yield
View SourceSupporting Sources (3)
Additional references from the underlying research that informed this benchmark.
"Northern hardwood forest management" (MSU Extension, E2769)
View Source"Basal area (m²/ha) for different tropical rain forests of the Far East" (Jaffré & Veillon, in Adansonia, 2021)
View Source
Forestry stocking guides for temperate hardwood stands
View Source