Farm Table says:
The take home messages from this GRDC funded research are below. Please access the full paper via the link below for methodology, references, acknowledgements and discussion.
Take home messages from the paper include:
- Deep ripping is most likely to improve grain yields on sandy soils where upper parts of the soil profile have been compacted by machinery traffic.
- Deep ripping is less effective on heavy clay soils which appears related to subsoil constraints.
- On clay soils with subsoil constraints, the application of ameliorants such as gypsum and organic matter in combination with deep ripping can often result in yield improvements.
- Post-ripping traffic management is critical for maintaining benefits, as is implement design and soil moisture conditions when conducting the operation.
- A thorough testing program is recommended to diagnose soil constraints to depth before undertaking any amelioration practices
- Soil type can vary markedly across a paddock, and the use of 3D spatial mapping to target where to treat specific soil constraints and minimise costs is currently being investigated.