Salinity Classification – Moderate (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.

Low/moderate waterlogging would indicate that that the watertable was not consistently above 0.3m in winter or 1.0m in summer.

Indicator species for low/moderate waterlogging:

Sea Barley grass, beard grass, black roly poly, woolly clover, ruby saltbush, common couch, Yorkshire fog, smooth heliotrope, pigweed, ice plant, bushy starwort, buck’s horn plantain, groundsel bush, rhagodia, orache, wavy-leaf saltbush, small leaf bluebush, ruby saltbush,

Sown saltland and pasture species such as river saltbush, old man saltbush, creeping saltbush, golden wreath wattle, Italian ryegrass, annual ryegrass, tall wheatgrass, Rhodes grass, burrmedic, phalaris or tall fescue 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