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

  • One-off soil inversion results in the complete burial of the water repellent topsoil in a layer typically at a depth of 15 to 35 cm, and brings to the surface a layer of wettable subsoil.

  • Claying involves adding and incorporating clay-rich subsoil into water repellent topsoil to overcome the repellence.

  • Soil water repellence is caused by an accumulation of waxy organic matter in the soil surface. It is worse in sandy textured topsoils.

  • Waterlogging in the higher rainfall areas (more than 450 mm annual rainfall) of south-west Western Australian crops and pastures is a common cause of reduced plant growth in winter, especially on d

  • Controlled traffic farming (CTF) is a farming system built on permanent wheel tracks where the crop zone and traffic lanes are permanently separated.

  • A small decrease in soil pH represents a large increase in soil acidity.

  • Agricultural lime is any product that is used to increase the pH of soil. In Western Australia, the three main sources are limesand, limestone and dolomitic lime.

  • Carbonate from calcium carbonate (or magnesium carbonate) neutralises acid in the soil.

  • Convert to 100% neutralising value (NV) for equal comparison and discount to allow for differences in particle size and speed of reaction.

  • Management of weeds, disease and nitrogen nutrition are ongoing challenges that limit yield potential.