Research on irrigated soils used for cotton production at the Agricultural Research Centre, Narrabri, over the past six years has identified several areas of concern.

Waterlogging can affect both the availability of micronutrients in the soil and the plant's ability to absorb nutrients from the soil.

This project continued the major study of waterlogging on heavy clay soils after furrow irrigation or heavy rainfall.

This project continued the major study of waterlogging on heavy clay soils after furrow irrigation or heavy rainfall.

Having outlined the complexity of this topic, I now intend to summarise the soil and plant mineral relations during waterlogging, followed by a brief review of the scientific principles to improve understanding of the