Nutrient supply from soil organic matter under different farming practices in the Central West of NSW

2015

Research organisation
Funding sources

Trial details

Researcher(s) Warwick Badgery (NSW DPI)
Satvinder Singh Bawa (NSW DPI)
Annette Cowie (NSW DPI)
Warwick Dougherty (NSW DPI)
Yunying Fang (NSW DPI)
Jharna R Sarker (NSW DPI)
Bhupinder Pal Singh (NSW DPI)
Year(s) 2015
Contributor Department of Primary Industries NSW
Trial location(s) Condobolin, NSW
Further information View external link
Nutrient supply from soil organic matter under different farming practices in the Central West of NSW locations
Aims

The aim of this study was to examine the impact of long-term farming practices on SOM decomposition and N, P and S net release in soil, thus evaluating the nutrient supply value of SOM in grain cropping systems.

Key messages
  • Conventional tillage enhances soil organic carbon (SOC) turnover with the potential to simultaneously increase plant available nutrients [nitrogen (N), phosphorus (P), sulfur (S)] in the soil compared with no-till and perennial pasture.
  • Across farming management practices and under ideal soil moisture, soil organic matter (SOM) could have supplied up to 45 kg N, 16 kg P and 19 kg S/ha in the absence of plant carbon (C) input.
  • Over a longer period (126 days), particularly if there is a lack of plant C input (e.g. a normal fallow period), any P or S released via native SOM turnover over a shorter period (e.g. over 30 days) would have been immobilised by microorganisms and/or adsorbed to soil minerals, hence decreasing P and S availability for crop uptake
Lead research organisation N/A
Host research organisation N/A
Trial funding source GRDC DAN00169
Trial funding source DPI NSW
Related program N/A
Acknowledgments

This experiment is part of the project ‘Building resilient and profitable grain cropping systems through improved knowledge of soil organic carbon fractions and their functionality’, DAN00169, jointly funded by NSW DPI and GRDC. It also involves Central West Farming Systems and on-farm collaborators.


Other trial partners Not specified
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Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Management systems
  • Soil Properties
  • Soil Improvement
Trial type Experimental
Trial design Replicated

Condobolin 2015

Sow date none specified
Harvest date none specified
Plot size Not specified
Plot replication Not specified
Other trial notes

This research paper is an extract from the publication Southern NSW Research Results 2015, available at
https://www.dpi.nsw.gov.au/agriculture/broadacre-crops/guides/publications/southern-nsw-research-results

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
Condobolin, NSW Red chromosol
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Condobolin, NSW Kandosol
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 Condobolin NSW
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Climate

Derived climate information

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

Condobolin NSW

CAUTION: Trial site locality unknown; Climate data sourced from Department of Primary Industries NSW office location
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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 report and links

2015 trial report



Trial last modified: 20-10-2023 09:00am AEST