Over clearing means that remnant vegetation is not available to soak up water both from the rainfall and sub soil. In poorly draining soils water runs off to the lowest point to where waterlogging occurs.
Waterlogging causes salinity. When water stops due to a natural or man-made barriers the fresh water evaporates leaving salt residues behind. This residue inhibits the growth of grasses and vegetation, so the site remains bare.
In WA, the flat terrain, poor drainage, varied soil types and geological barriers below the soil surface all exaggerate salinity. Solutions are wide and varied. Deep and surface drainage, strategic block planting both upslope and along valley floors and fodder reserves. A combination of these solutions will help halt and contain the spread of dryland salinity.
PALS adopt a very realistic approach to the fight against salinity. Salinity is a huge issue and sometimes unless approached on a catchment scale individual projects wont necessary reduce the rising watertables. However, integrating fodder to poor soil types which have been affected by salinity enables these soils to be brought back into production using fodder shrubs.
With over 35 year’s experience in the Wheatbelt implementing salinity programs we have seen salt affected land become productive.