Rows of trees over the upper and middle catchment can give very effective recharge control. In grazing areas especially, it is vitally important to maximize the water-use of pastures. This can be achieved by using correct superphosphate rates, by clover reseeding and by conservative stocking rates to prevent overgrazing. Increasing discharge Discharge areas occur in valley flats and just upslope of dolerite dykes and granite bedrock outcrops where the saline groundwater has risen to within two metres of the ground surface. The aim on discharge areas, which can all become salt-affected, is to lower the water table level to two metres and keep it at that level.
Tree density needs to increase with increasing rainfall.
These plants also use up groundwater and provide a surface mulch to reduce salt accumulating on the soil surface. Further reading Farmnote no. Its availability does not imply suitability to other areas, and any interpretation or use is the responsibility of the user. Mention of product or trade names does not imply recommendation, and any omissions are unintentional. Recommendations were current at the time of preparation of the original publication.