How to diagnose subsoil constraints in Mallee soils

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  • Identify Key Constraint

    Identify the main soil constraint in the target zone before selecting a treatment.

  • Recognise Multiple Issues

    Poor crop performance in Mallee soils often results from a combination of surface and subsoil constraints.

  • Use Soil Testing

    Complement field inspections with soil testing at different depths before making major amelioration decisions.

Project Overview

What’s Holding Your Crop Back?

Poor crop performance in Mallee paddocks often results from a range of interacting soil constraints across different soil types, including sandy rises, calcareous soils, red-brown earths, shallow soils over calcrete, and heavier subsoil layers. These constraints can affect crop establishment, root growth, water use, and nutrient uptake, with common issues including water repellence, low fertility, compaction, high soil strength, alkalinity, salinity, sodicity, boron toxicity, chloride toxicity, subsoil carbonate, and erosion risk.

Effective management starts with correctly identifying the main constraint within the target zone of the paddock before selecting a treatment. This is important because the most appropriate response depends on whether the limitation is physical, chemical, nutritional, or a combination of factors.

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