Achieving a salt balance - Should it be a management objective?
T Thayalakumaran, MG Bethune, TA McMahon
AGRICULTURAL WATER MANAGEMENT | ELSEVIER | Published : 2007
The long-term sustainability of irrigated agriculture depends on protecting land and water resources from salinity. Generally, a favourable salt balance (mass out ≥ mass in) is considered necessary for sustainable irrigated agriculture. This concept has been used in irrigated agricultural systems to satisfy varying objectives. In this paper we discuss the application of the salt balance concept at various spatial scales including root-zone, farm, irrigation-region and catchment scales. The relationship between the spatial scales, the governing processes and the time to reach salt equilibrium is discussed. Recognised management options for achieving a favourable salt balance are questioned wi..View full abstract