Salinity Classification – Medium (subsoil salinity 4-8 dS/m ECe)

Most agricultural plants are visibly affected. Annual legumes are struggling to survive or are absent from the site. Plant growth is often patchy. Grain legumes and cereals are strongly affected. Most perennial pasture grasses also show reduced growth and vigour. High waterlogging would indicate that the watertable was consistently above 0.3m in winter or 1.0m in summer.

Indicator species for high levels of waterlogging:

Yorkshire fog, toad rush, spiny rush, Australian saltgrass, beard grass, orache, groundsel bush, river saltbush, marine couch, saltwater couch, common couch, Sown saltland and pasture species such as puccinellia, kikuyu, tall wheatgrass, strawberry clover, Persian clover or gland clover may also be present.

 

Download the 'nypa scale' conversion chart

Table 2. Suggested classification system for categorisation of soil salinity in Australia (Barrett-Lennard et al. 2008b)

SUGGESTED
TERM
ECe RANGE
(dS/m)
FOR SANDS EC1:5 RANGE
FOR LOAMS
FOR CLAYS TYPICAL PLANTS
AFFECTED
Non-saline 0-2 0–0.14 0–0.18 0–0.25 -
Low salinity 2–4 0.15–0.28 0.19–0.36 0.26–0.50 Beans
Moderate salinity 4–8 0.29–0.57 0.37–0.72 0.51–1.00 Barley
High salinity 8–16 0.58–1.14 0.73–1.45 1.01–2.00 River saltbush,
saltwater couch
Severe salinity 16–32 1.15–2.28 1.46–2.90 2.01–4.00 Puccinellia
Extreme salinity >32 >2.29 >2.91 >4.01 Samphire

For more information on indicator species, see the SALTdeck Cards