See Table 2 . The Soil and Land Conservation Regulations 1992 require landowners to notify the Commissioner of Soil and Land Conservation of their intent to drain saline water at least 90 days before draining begins. Order suitable tree seedlings as early in the year as possible to ensure the availability of good quality, hardened stock of the species or varieties required. Assess site conditions. Piezometers allow you to measure depth and salinity of groundwater and indicate if groundwater is rising at a rate likely to kill some tree species.
Electromagnetic surveys can indicate severity and likely spread of salinity.
An instrument called an EM38 measures the electrical conductivity of the soil to a depth of one metre that can be related to its salt and moisture content. These instruments are available from survey companies and on request from some district offices of Agriculture Western Australia. The extent of salt affected areas may not be obvious. It is a good idea to fence out and plant salt tolerant species on a generous area around the margins of the evidently salt affected areas. Erect fencing around the area to be established with trees, and re-align existing fences, if necessary, well in advance of planting seedlings.