Subsoil constraints: Understanding and management

Subsoil constraints cost WA growers more than $600 million each year in lost production (Herbert 2009). These include acidity, nutrient disorders (deficiencies, toxicities), compaction, sodicity, waterlogging and salinity. Often one or more of these constraints are present and can decrease root depth and function to the extent that yield penalties are incurred. Current diagnostics are often insufficient or cost prohibitive on a large scale. Being better able to predict the extent and severity of these constraints, as well as the evidence in ameliorating these soils would enable growers to more confidently and accurately identify and assess management and/or mitigation options for their circumstance.

The project achieve state-wide coverage through partnerships with grower groups and extension specialists in the northern (Liebe, West Midlands, Mingenew Irwin Groups), central (MADFIG, Kellerberrin, Bodallin, Facey, Corrigin, LIFT) and southern (RAIN, SEPWA, FBG, Stirlings to Coast, North Stirlings, Bugs and Biology) wheatbelt of WA.