Herbicides affect yield and nitrogen fixation in peas

CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Elizabeth Drew (CSIRO)
Vadakattu Gupta (CSIRO)
David Roget (CSIRO)
Year(s) 2004
Contributor Central West Farming Systems
Trial location(s) Minnipa, SA
Herbicides affect yield and nitrogen fixation in peas locations

To investigate the effects of six commonly used herbicides for the control of grass and/or broadleaved weeds in peas on the growth, nitrogen fixation and yield of the crop. The impact of spray time was also investigated.

Key messages
  • In-crop applications of some broadleaf and grass herbicides can reduce nodulation and nitrogen fixation of peas.
  • Timing of herbicide application and seasonal conditions play an important role in herbicide-legume interactions. 
  • Late applications of some broadleaf and grass herbicides can reduce crop yields.
Lead research organisation Central West Farming Systems
Host research organisation N/A
Trial funding source GRDC
Related program N/A

Thanks to Amanda Cook and Michael Bennet from the Minnipa Agricultural Centre for their assistance implementing, maintaining and sampling the trial. This work was funded by the GRDC.

Other trial partners Not specified
Download the trial report to view additional trial information


Crop type Field peas
Treatment type(s)
  • Herbicide
  • Herbicide: Timing
Trial type Experimental
Trial design Replicated

Minnipa 2004

Sow date 3 June 2004
Harvest date 28 October 2004
Plot size 10m x 1.44m
Plot replication Not specified
Download the trial report to view additional method/treatment information
Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Minnipa, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Minnipa, SA Calcarosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Minnipa SA
2004 296.1mm
2003 293.2mm
2002 283.3mm
2001 343.9mm
2000 389.0mm
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties



Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Minnipa SA

NOTE: Exact trial site locality unknown - Climate data may not be accurate

Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.

Trial last modified: 05-05-2018 17:21pm AEST