Predicta rNod
Predicta rNod is a DNA-based soil testing service for broadacre farming. It helps pulse producers identify the number of rhizobia in soil for 3 legume inoculation groups – E and F, N, G and S.
Legumes grown in paddocks that are deficient in rhizobia will cause:
- poor nodulation
- low nitrogen fixation
- reduced biomass
- reduced grain yield
- lower grain protein
- potential crop failure.
Our world-leading technology provides a fast and cost-effective solution, helping growers with rhizobium management.
Paddocks respond best to inoculation when soil nitrogen levels are low, as the crop is reliant on rhizobia for its nitrogen supply. When inoculants are applied, paddocks often achieve yield increases of up to 20%.
Learn more about the benefits of Predicta rNod:
Rhizobium tested
Inoculant groups detected by Predicta rNod
Inoculant groups detected by Predicta rNod
| Rhizobia
| Commercial inoculant group – strain of rhizobia | Legumes nodulated |
|---|---|---|
| Rhizobium leguminosarum bv. viciae | E: WSM4643 | Field pea, lentil and vetch |
| F: SRDI969 | Faba and broad bean | |
| Bradyrhizobium canariense | G: WU425 | Lupin, serradella |
| S: WSM471 | Serradella, lupin | |
| Mesorhizobium ciceri | N: CC1192 | Chickpea |
Report results
Report results
Results include the:
- log (rhizobia per gram of soil)
- estimated inoculation required (high, medium, low or nil), based on the risk to the crop and benefit from inoculation
- soil pH, measured in calcium chloride
- soil texture of samples.
These parameters can influence rhizobia survival and soil responsiveness to inoculation.
Example report
Access Predicta rNod services
Growers can access Predicta rNod through a local SARDI-accredited agronomist. They will organise sampling, interpret the results and advise on management options appropriate for your farming system.
The cost of testing is determined by the agronomist delivering the service.
Contact us to arrange an agronomist for broadacre crop soil testing.
Learn about SARDI's short agronomist accreditation course and register your interest in delivering Predicta services.
Submit samples
Following the correct soil sampling protocol is essential for accurate results.
Sampling protocols
Sampling protocols
Use the same guidelines as for Predicta B – the addition of stubble is not necessary for Predicta rNod samples.
For accurate inoculation requirements of a pulse crop, take samples in Autumn prior to sowing, usually during March.
Sampling can also be done earlier in November or December to inform inoculant orders, noting:
- if no rhizobia are detected, the result will not change over summer
- if numbers are low or moderate, you need to account for a possible decline in rhizobia number per gram of soil over the summer months.
We are accredited to receive samples from anywhere in Australia.
Contact
Submit samples
SARDI Molecular Diagnostics Group
Plant Research Centre
2A Hartley Grove
Urrbrae SA 5064
Order free Predicta rNod sample bags
Russell Burns
Phone: 0401 122 115
Email: russell.burns@sa.gov.au
Matthew Rowe
Phone: 0491 933 041
Email: matthew.rowe2@sa.gov.au
Track samples
Nigel Percy
Phone: (08) 8429 2236
Email: nigel.percy@sa.gov.au
Interpret results
Dr Liz Farquharson
Phone: (08) 8429 2243
Email: liz.farquharson@sa.gov.au
