Soil pH
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
A mature, ~50-year-old first-rotation plantation, representing a stable and productive system, exhibited a topsoil (0-10 cm) pH of 6.0.
Soil pH measured in water at a 1:5 soil to water ratio in the top 0-10 cm of soil.
Soil pH is the measure of acidity or alkalinity of the soil, here measured in water at a 1:5 soil to water ratio, representing a stable and productive mature plantation in tropical and subtropical rainforest production forestry.
The 1R plantation is a long-established, commercially productive forest that has reached a state of relative maturity and ecological stability over a 50-year period. It is the most appropriate representation of a sustainable, 'best-on-offer' condition within a production context.
Sources (1)
Supporting Sources (4)
Additional references from the underlying research that informed this benchmark.
Soil acidity | Soil | Farm management - Agriculture Victoria, accessed August 28, 2025
View SourceSoil carbon and nutrient pools, microbial properties and gross nitrogen transformations in adjacent natural forest and hoop pine plantations of subtropical Australia - ResearchGate, accessed July 20, 2025
View SourceMultiple soil element and pH interactions constrain plant performance on tropical soils with a long history of fire - CSIRO PUBLISHING | Soil Research, accessed July 20, 2025
View SourceImproving Soil Structure and pH Levels (DPIFM_NT) - Department of ..., accessed July 20, 2025
View Source