Identifying, understanding and managing soil constraints are major challenges to increasing agricultural productivity.
A review of soil constraints in Australia highlighted the need for consistent national, regional and industry-wide mapping products for key soil constraints.
Key priorities have been identified to overcome important soil constraints across a range of different industries and agricultural regions of Australia.
Practical, economic, accessible and system integrated amelioration strategies that target major constraints are more likely to be adopted than expensive novel and niche products.
In Australia, approximately 75% of agricultural soils have constraints that limit productivity. These soil constraints may be present in the surface of the profile, in the subsoil or often both. Producers face the challenge of identifying;
- which constraints are limiting production,
- where these constraints occur,
- the effectiveness of different strategies to improve productivity, and
- ways to economically improve or manage soil constraints particularly where there are multiple constraints.
The project team identified:
- locations and impacts of soil constraints, including mapping products and current and past research projects, and
- future research needs for soil improvement strategies and products for the Soil CRC to consider.
This study identified the major soil constraints to agriculture through analysing scientific literature and consulting with soil researchers, advisers and industry stakeholders. Expertise from across the spectrum of stakeholders including: practitioners, managers, technical experts and innovators was captured. Five methods were applied to capture, combine and analyse data including desktop reviews, mapping activities, technical working groups, and adviser and industry surveys.
Activities included undertaking a collaborative review to identify and map current research into soil amelioration products; holding a technical specialist workshop; conducting baseline adviser and industry surveys; studies of currently available maps of soil constraints to agricultural production and amelioration products and a needs assessment for Program 3 related to soil amelioration products and technology.
Review and identification of soil constraints as determined by the scientific literature, soil researchers, advisers and industry stakeholders.
Key considerations for evaluating the economic and environmental impacts of soil constraints, their management and research investment.
The development of strong networks among government, research and industry.
Recommendations for research areas.
A baseline account of current soil constraint research including available mapping products, current research on soil amelioration strategies and products and identification of future research needs in this field.
There is still fundamental soil science research to be undertaken to better understand, map and develop metrics for monitoring and evaluating the impacts of soil constraints on agricultural production. Further research is suggested into key soil constraints which include: dispersive clays, alkalinity, acidity, salinity, poor/coarse/compacted soil structure, nutrient deficiency and declining organic carbon and problematic sandy soils.
Susan Orgill, John Friend, Mark Whatmuff, Ehsan Tavakkoli, Guangdi Li, Richard Hayes, Bhupinderpal Singh, Simon Clarendon, Belinda Hackney (NSW Department of Primary Industries)
Jason Condon (Charles Sturt University)
Richard Bush, Nanthi Bolan, Greg Hancock (University of Newcastle)
Fiona Hart (Riverine Plains)
Di Parsons, David Watt (Central West Farming Systems)
Chengrong Chen, Mehran Rezaei Rashti, Maryam Esfandbod (Griffith University)
Steven Raine, John Bennett, Dio Antille (University of Southern Queensland)
Richard Harper, Richard Bell, David Henry, Qifu Ma (Murdoch University)
Marcus Hardie, Geoff Dean (University of Tasmania)
Roger Armstrong, Mark Imhof, Murray Hart, Katherine Dunsford, Melissa Cann, Rebecca Mitchell (Department of Economic Development, Jobs, Transport and Resources)
Nathan Robinson, Darren Kidd (Federation University)
David Davenport, Nigel Wilhelm (Department of Primary Industries and Regions, South Australia)
Terry Rose (Southern Cross University)
Orgill S., Antille D., Armstrong R., Bell R., Bolan N., Bush R., Cann M., Chen C., Clarendon S., Condon J., Davenport D., Dean G., Dunsford K., Esfandbod M., Friend J., Hackney B., Hancock G., Hardie M., Harper R., Hart F., Hart M., Hayes R., Henry D., Imhof M., Kidd D., Li F., Ma Q., Malcolm B., Bennett J.Mc., Mitchell R., Parsons D., Raine S., Rezaei Rashti M., Robinson N., Rose T., Singh B., Tavakkoli E., Tullberg J., Watt D., Whatmuff M. and Wilhelm N. (2018) Mapping projects on ameliorating soil constraints, and review of soil constraints, products and technologies. Final Project Report, Soil CRC. Cann, M.A., Mitchell, R.A., Orgill, S.E. and Hackney B. (2018). Australian soil constraints to agricultural production – Farm advisor perceptions. National Soils Conference Canberra 2018 Proceedings. Orgill S.E., Bell, R., Armstrong, R., Antille, D., Bennett, J., Bolan, N., Cann, M.A., Condon, J., Davenport, D., Imhof, M., Malcolm, B., Ma, Q. and Tavakkoli, E. (2018) Soil constraints in Australian agriculture: Research priorities and approaches. National Soils Conference Canberra 2018 Proceedings.
Fact Sheet Author
Susan Orgill (NSW Department of Primary Industries)
Posted Mar 27, 2021