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
While an upper detrimental threshold for ecological health due to over-management (e.g., over-liming) could be considered if pH (CaCl₂) consistently exceeds approximately 7.0 to 7.2, this is not the primary management concern.
Soil pH measured in 0.01M CaCl₂, indicating the upper detrimental threshold beyond which ecological health may be harmed due to over-liming or excessive alkalinity.
Upper detrimental soil pH threshold measured in 0.01M CaCl₂ above which micronutrient deficiencies and ecological harm may occur.
Above this level, micronutrient deficiencies (Fe, Mn, Zn, Cu, B) become a significant concern for many crops and could impact plant community health and soil biology.
Sources (1)
General soil science principles and reviewed literature
View SourceSupporting Sources (1)
Additional references from the underlying research that informed this benchmark.
Cotton Production and Sustainability in the Northern Territory: A Comprehensive Analysis of Yield, Soil Properties, and Cover Crops (Mwando et al., 2024, In: Proceedings of the 21st Australian Agronomy Conference)
View Source