Plants experience osmotic stress when they are exposed to salinity in soil.
Want to know more about soil sodicity and salinity? Watch this short video from the Understanding Your Soils Series from Soil Science Australia.
soilquality.org.au
There are no hard and fast rules for diagnosing soil affected by sodicity in semi-arid and higher-rainfall landscapes.
The Australian Soil Classification (ASC) system provides a framework for organising knowledge about Australian soils by allocating soils to classes.
The Australian Soil and Land Survey Field Handbook specifies methods and terminology for soil and land surveys.
Internal pores in ironstone gravel particles provide additional water storage, new surfaces for nutrient binding and microhabitats for microorganisms.
Testing needs to be done when the soil is sufficiently wet to depth – preferably at the drained upper limit, or field capacity.
Gravel and bulk density calculator
Tool or calculator
A simple web-based tool for adjusting soil carbon and nutrient concentration results for either bulk density or gravel/stone content is available on soilquality.org.au
CSIRO
Testing for dispersion and slaking
Fact sheet
Simple guide to testing for dispersion
