Date
2017/02/07
Organisations
CSIRO
The University of Western Australia
GRDC
Authors
Mark Farrell
Lynne M Macdonald
Mike Webb
Mike Wong
Sasha Jenkins
Lyn Abbott
Take home messages
- It is difficult to make generalisations or predictions as to potential performance of biological amendments due to wide variability in chemical composition between and within classes (based on assessment of greater than 80 amendments).
- This project has investigated the chemical variability and performance (pot and field) across a range of biological amendment classes (biostimulants, humates, organic amendments, alternative fertilisers).
- No single amendment or amendment class consistently performed better than district practice fertiliser treatments across eight field trials established in 2015. Results from 2016 will provide an opportunity to assess cumulative effects under a more favourable rainfall season.
- On-farm testing of amendments across a decile range is required in order to understand which amendments have more potential in supporting productivity under variable environments and associated stresses.