The objective of this project was to establish one replicated field trial to demonstrate best practice liming strategies and a field demonstration of the impacts of lime quality per annum, over three years. It demonstrated different incorporation methods, evaluated the impact of different lime types/ sources, as well as extending findings including comparisons of the economic and agronomic
returns using the Acid Soils SA calculator tools (https://acidsoilssa.com.au/index.php/home/resources/).

•  A replicated liming rate and incorporation trial at Lilliput clearly demonstrated how applying lime, followed by incorporation, increased subsurface pH values and reduced aluminium availability in the soil.
• There was no difference in yields due to liming rate or incorporation method in the replicated plot trial during 2024 or 2023, likely due to good seasonal and growing conditions.
• A demonstration trial looking at fine verses coarse lime quality highlighted how the rate of lime applied (3 t/ha) was more influential than the type of lime for increasing pH in this soil.
• Incremented soil testing helps identify the severity of acidification and allow the right amount of lime to be calculated for your soil type. It will also help identify any other subsoil constraints that could affect the incorporation method.
• While deep incorporation of lime has shown positive results in this trial, it’s important to only incorporate lime to the depth that is suitable for that soil, considering the presence of other soil constraints (eg sodicity, slaking)
• Tools for economic analysis of liming and incorporation exist and are useful for scenario modelling, however they do not reflect the complexity of the issue.