Pedotransfer functions, which predict difficult-to-measure soil properties, such as hydraulic, properties, from more easy-to-obtain soil properties, such as texture and organic matter, content, have been widely developed over recent years. However, there has not been a, concentrated effort to develop pedotransfer functions for the heavy clay soils (Vertosols) used, for cotton production. This research has tried to fill this gap by * Developing a database of hydraulic properties and basic soil properties for cotton-growing, soils in southeastern Australia * Developing pedotransfer functions from this database; and, Verifying these pedotransfer functions against literature data and an in-situ field infitration, experiment