Managing soils

Soil productivity is largely determined by its ability to provide water and nutrients to plants along with the way the soil constraints are being managed by growers. In many instances a particular soil will be constrained by more than one physical or chemical characteristic. In many cases, there are practical and profitable management options to reduce the effects of a constraint, leading to improved yields and profitability. Recognising soil constraints and their potential impact on agricultural systems is difficult, but very important. The department can provide the technical information needed for growers to understand the condition and properties of their soils, and develop management strategies to increase productivity and profitability and improve soil condition.

Articles

  • Dispersive soils are common in the agricultural areas of Western Australia, where they occur mainly as duplex or gradational profiles.

  • Waterlogging causes clay to disperse in sodic soils, leading to soil structure collapse.

  • Dispersive (sodic) soils are common in the south-west agricultural area of Western Australia, where they occur mainly as duplex or gradational profiles.

  • This page explains the factors that influence the degree of dispersion in sodic soils: soil structure (aggregate stability), cation exchange capacity, calcium to magnesium ratio, exchangeable sodiu

  • It is not always easy to identify the degree of dispersion or sodicity in soils. The choice of suitable management depends on knowing the soil sodicity and whether dispersion is a problem.

  • Soil aggregate stability is the ability of a soil to regulate the movement and storage of air and water throughout the soil profile.