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 10 benchmarks together — the OptimalRange form drives the primary score, while 9 guard(s) constrain the result.
Evidence & Context
A pH(CaCl₂) range of 5.5 to 6.5 is recommended for achieving maximum phosphorus availability for wheat, ... A broader pH(CaCl₂) range of 5.0 to 7.0 is cited as the zone where most soil microbial activity occurs.
Soil pH measured in 0.01M calcium chloride solution (pH(CaCl₂)) indicating the range supporting optimal nutrient availability and microbial activity.
This benchmark defines the optimal soil pH range for phosphorus availability and microbial activity in temperate agricultural soils.
Based on GRDC guidelines linking pH to nutrient availability and microbial health in temperate cropping systems.
Sources (1)
Grains Research and Development Corporation (GRDC). (2016). GrowNote Wheat South 05 Nutrition.
View SourceSupporting Sources (1)
Additional references from the underlying research that informed this benchmark.
McIntyre, S., Stol, J., Harvey, J., Nicholls, A.O., Campbell, M., Reid, A., Manning, A.D. & Lindenmayer, D. (2010). Biomass and floristic patterns in the ground layer vegetation of box-gum grassy eucalypt woodland in Goorooyarroo and Mulligans Flat Nature Reserves, Australian Capital Territory. Cunninghamia 11(3): 319–357.
View Source