Agronomic management combining early-sowing on establishment opportunities, cultivar options and adequate nitrogen is critical for canola (Brassica napus) productivity and profit in low-rainfall environments
Therese M. McBeath
A G , Elizabeth A. Meier B , Andrew Ware C , John Kirkegaard D , Michael Moodie E , Bill Davoren A and Ed Hunt F
+ Author Affiliations
- Author Affiliations
A CSIRO Agriculture and Food, Locked Bag 2, Glen Osmond, SA 5064, Australia.
B CSIRO Agriculture and Food, 306 Carmody Road, St Lucia, Qld 4067, Australia.
C SARDI, Port Lincoln, SA 5606, Australia.
D CSIRO Agriculture and Food, GPO Box 1700, Canberra, ACT 2601, Australia.
E Frontier Farming Systems, Mildura, Vic. 3500, Australia.
F Ed Hunt Consulting, Wharminda, SA 5603, Australia.
G Corresponding author. Email: therese.mcbeath@csiro.au
Crop and Pasture Science 71(9) 807-821 https://doi.org/10.1071/CP20226
Submitted: 2 July 2020 Accepted: 31 August 2020 Published: 22 September 2020
Journal Compilation © CSIRO 2020 Open Access CC BY-NC-ND
Abstract
Sustaining diverse, yet productive crop sequences that integrate break crops such as canola (Brassica napus L.) remains a critical challenge for farming systems in low-rainfall cropping environments. Recent advances in canola productivity through early sowing, understanding of critical stress periods, hybrid cultivars and improved nitrogen (N) fertilisation offer promise under many conditions but require careful adaptation for risky, low-rainfall environments. A series of eight experiments was implemented over four growing seasons (2015–18) in the low-rainfall environments of southern Australia to test combinations of sowing date, cultivar selection and N-management strategies. Simulation modelling extended the field experiment results, enabling a simple, whole-farm profit–risk analysis across growing season deciles. The aim was to identify combinations of practices where the potential production and risk were understood, thereby assisting management decisions in low-rainfall cropping systems. Earlier sowing (April) was generally beneficial but only where seasonal conditions led to successful establishment, meaning that the best fit for canola in low-rainfall environments is as an opportunity crop. A hybrid cultivar (triazine tolerant) did not provide a yield advantage in an early experiment, but productivity increases were measured with a modern hybrid cultivar (Clearfield) in a later experiment. Profit-risk analysis suggested that a yield advantage of >20% over open-pollinated cultivars needs to be sustained across the full range of season deciles to generate economic advantage. Although there was relative insensitivity to the timing of N application, an adequate dose of N, either through fertiliser or legume crops, was critical to improve canola productivity. We conclude that opportunities exist to make significant gains in yield (by up to 110% compared with current standard practice) and profit–risk outcomes (~30% increased gross margins across all season types) for canola in low-rainfall environments by using a package of agronomic management decisions that includes early sowing on genuine establishment opportunities, hybrids that offer sustained yield benefits, and matching N dose from both fertiliser and legume crops to yield potential of the soil type and seasonal outlook.
Keywords: canola hybrids, establishment opportunity, rainfall limitation, risk management, sowing time, nitrogen application, yield gain.
References
ABARES (2019) Australian crop report. Department of Agriculture, Water and the Environment, Canberra, ACT. Available at: https://www.agriculture.gov.au/abares/research-topics/agricultural-commodities/australian-crop-report (accessed 27 August 2020).Angus JF, Grace PR (2017) Nitrogen balance in Australia and nitrogen use efficiency on Australian farms. Soil Research 55, 435–450.
| Nitrogen balance in Australia and nitrogen use efficiency on Australian farms.Crossref | GoogleScholarGoogle Scholar |
Assefa Y, Prasad PVV, Foster C, Wright Y, Young S, Bradley P, Stamm M, Ciampitti IA (2018) Major management factors determining spring and winter canola yield in North America. Crop Science 58, 1–16.
| Major management factors determining spring and winter canola yield in North America.Crossref | GoogleScholarGoogle Scholar |
Brennan RF, Bolland MDA (2009) Comparing the nitrogen and phosphorus requirements of canola and wheat for grain yield and quality. Crop & Pasture Science 60, 566–577.
| Comparing the nitrogen and phosphorus requirements of canola and wheat for grain yield and quality.Crossref | GoogleScholarGoogle Scholar |
Brill RD, Jenkins LM, Gardnrew MJ, Lilley JM, Orchard BA (2016) Optimising canola establishment and yield in south-eastern Australia with hybrids and large seed. Crop & Pasture Science 67, 409–418.
| Optimising canola establishment and yield in south-eastern Australia with hybrids and large seed.Crossref | GoogleScholarGoogle Scholar |
Browne C, Hunt JR, McBeath TM (2012) Break crops pay in the Victorian Mallee. In ‘Capturing opportunities and overcoming obstacles in Australian agronomy. Proceedings 16th Australian Agronomy Conference’. 14–18 October 2012, Armidale, NSW. (Ed. I Yunusa) (The Regional Institute: Gosford, NSW) Available at: http://www.regional.org.au/au/asa/2012/crop-production/7955_brownecj.htm
Burk L, Dalgliesh NP (2013) ‘Estimating plant available water capacity: a methodology.’ (Grains Research and Development Corporation: Canberra, ACT) Available at: https://www.apsim.info/wp-content/uploads/2019/10/GRDC-Plant-Available-Water-Capacity-2013.pdf
Dalgliesh NP, Cocks B, Horan H (2012) APSoil: providing soils information to consultants, farmers and researchers. In ‘Capturing opportunities and overcoming obstacles in Australian agronomy. Proceedings 16th Australian Agronomy Conference’. 14–18 October 2012, Armidale, NSW. (Ed. I Yunusa) (The Regional Institute: Gosford, NSW) Available at: http://www.regional.org.au/au/asa/2012/soil-water-management/7993_dalglieshnp.htm#TopOfPage
DPIRD (2018) 2019 Canola variety sowing guide for Western Australia. Bulletin 4897. Department of Primary Industries Resources and Development, Perth, W. Aust. Available at: https://www.agric.wa.gov.au/sites/gateway/files/DPIRD%20canola%20variety%20sowing%20guide%202019%20Bulletin%204897.pdf
Fletcher AL, Minkey D, McNee M, Sharma DL, Abrecht DG, Roberts-Craig P (2015) Farm level considerations of sowing date for canola and wheat. In ‘Building productive, diverse and sustainable landscapes. Proceedings 17th Australian Agronomy Conference’. 20–24 September 2015, Hobart, Tas. (Eds T Acuña, C Moeller, D Parsons, M Harrison) pp. 386–389. (Australian Society of Agronomy) Available at: http://agronomyaustraliaproceedings.org/images/sampledata/ASA17ConferenceProceedings2015.pdf
Fletcher A, Flohr B, Harris F (2019) Evolution of early sowing systems in Southern Australia. In ‘Australian agriculture in 2020: from conservation to automation’. pp. 291–306. (Eds J Pratlley, J Kirkegaard) (Agronomy Australia and Charles Sturt University: Wagga Wagga, NSW)
Harries M, Seymour M, Farre I (2018) Early sowing profitable in 2015 and 2016. Canola agronomy research in Western Australia. Bulletin 4986. Department of Primary Industries and Regional Development, Perth, W. Aust.
Hocking PJ, Stapper M (2001) Effects of sowing time and nitrogen fertiliser on canola and wheat, and nitrogen fertiliser on Indian mustard. I. Dry matter production, grain yield and yield components. Australian Journal of Agricultural Research 52, 623–634.
| Effects of sowing time and nitrogen fertiliser on canola and wheat, and nitrogen fertiliser on Indian mustard. I. Dry matter production, grain yield and yield components.Crossref | GoogleScholarGoogle Scholar |
Hocking PJ, Randall PJ, DeMarco D (1997) The response of dryland canola to nitrogen fertilizer: partitioning and mobilization of dry matter and nitrogen, and nitrogen effects on yield components. Field Crops Research 54, 201–220.
| The response of dryland canola to nitrogen fertilizer: partitioning and mobilization of dry matter and nitrogen, and nitrogen effects on yield components.Crossref | GoogleScholarGoogle Scholar |
Hocking PJ, Kirkegaard JA, Angus JF, Bernardi A, Mason LM (2002) Comparison of canola, Indian mustard and Linola in two contrasting environments III. Effects of nitrogen fertilizer on nitrogen uptake by plants and on soil nitrogen extraction. Field Crops Research 79, 153–172.
| Comparison of canola, Indian mustard and Linola in two contrasting environments III. Effects of nitrogen fertilizer on nitrogen uptake by plants and on soil nitrogen extraction.Crossref | GoogleScholarGoogle Scholar |
Holzworth DP, Huth NI, deVoil PG, Zurcher EJ, Herrmann NI, McLean G, Chenu K, van Oosterom EJ, Snow V, Murphy C, Moore AD, Brown H, Whish JPM, Verrall S, Fainges J, Bell LW, Peake AS, Poulton PL, Hochman Z, Thorburn PJ, Gaydon DS, Dalgliesh NP, Rodriguez D, Cox H, Chapman S, Doherty A, Teixeira E, Sharp J, Cichota R, Vogeler I, Li FY, Wang E, Hammer GL, Robertson MJ, Dimes JP, Whitbread AM, Hunt J, van Rees H, McClelland T, Carberry PS, Hargreaves JNG, MacLeod N, McDonald C, Harsdorf J, Wedgwood S, Keating BA (2014) APSIM: evolution towards a new generation of agricultural systems simulation. Environmental Modelling & Software 62, 327–350.
| APSIM: evolution towards a new generation of agricultural systems simulation.Crossref | GoogleScholarGoogle Scholar |
Isbell RF (2002) ‘The Australian Soil Classification.’ (CSIRO Publishing: Melbourne)
Kirkegaard JA (2019) Incremental transformation: success from farming system synergy. Outlook on Agriculture 48, 105–112.
| Incremental transformation: success from farming system synergy.Crossref | GoogleScholarGoogle Scholar |
Kirkegaard JA, Hocking PJ, Angus JF, Howe GN, Gardner PA (1997) Comparison of canola, Indian mustard and Linola in two contrasting environments. II. Break-crop and nitrogen effects on subsequent wheat crops. Field Crops Research 52, 179–191.
| Comparison of canola, Indian mustard and Linola in two contrasting environments. II. Break-crop and nitrogen effects on subsequent wheat crops.Crossref | GoogleScholarGoogle Scholar |
Kirkegaard JA, Hunt JR, McBeath TM, Lilley JM, Moore A, Verburg K, Robertson MJ, Oliver YM, Ward PR, Milroy S, Whitbread AM (2014) Improving water productivity in the Australian grains industry: a nationally coordinated approach. Crop & Pasture Science 65, 583–601.
| Improving water productivity in the Australian grains industry: a nationally coordinated approach.Crossref | GoogleScholarGoogle Scholar |
Kirkegaard JA, Lilley JM, Brill RD, Sprague SJ, Fettell NA, Pengilley GC (2016) Re-evaluating sowing time of spring canola (Brassica napus L.) in south-eastern Australia: how early is too early? Crop & Pasture Science 67, 381–396.
| Re-evaluating sowing time of spring canola (Brassica napus L.) in south-eastern Australia: how early is too early?Crossref | GoogleScholarGoogle Scholar |
Lilley JM, Flohr BM, Whish JPM, Farre I, Kirkegaard JA (2019) Defining optimal sowing and flowering periods for canola in Australia. Field Crops Research 235, 118–128.
| Defining optimal sowing and flowering periods for canola in Australia.Crossref | GoogleScholarGoogle Scholar |
Ma BL, Biswas DK, Herath AW, Whalen JK, Ruan SQ, Caldwell C, Earl H, Vanesse A, Scott P, Smith DL (2015) Growth, yield and yield components of canola as affected by nitrogen, sulfur, and boron application. Journal of Plant Nutrition and Soil Science 178, 658–670.
| Growth, yield and yield components of canola as affected by nitrogen, sulfur, and boron application.Crossref | GoogleScholarGoogle Scholar |
Mason MG, Brennan RF (1998) Comparison of growth response and nitrogen uptake by canola and wheat following application of nitrogen fertilizer. Journal of Plant Nutrition 21, 1483–1499.
| Comparison of growth response and nitrogen uptake by canola and wheat following application of nitrogen fertilizer.Crossref | GoogleScholarGoogle Scholar |
McBeath TM, Gupta VVSR, Llewellyn RS, Davoren CW, Whitbread AM (2015) Break-crop effects on wheat production across soils and seasons in a semi-arid environment. Crop & Pasture Science 66, 566–579.
| Break-crop effects on wheat production across soils and seasons in a semi-arid environment.Crossref | GoogleScholarGoogle Scholar |
Meier E, Lilley J, Kirkegaard J, Whish J, McBeath T (2020) Management practices that maximise gross margins in Australian canola (Brassica napus L.). Field Crops Research 252, 107803
| Management practices that maximise gross margins in Australian canola (Brassica napus L.).Crossref | GoogleScholarGoogle Scholar |
Monjardino M, McBeath TM, Brennan L, Llewellyn RS (2013) Are farmers in low-rainfall cropping regions under-fertilising with nitrogen? A risk analysis. Agricultural Systems 116, 37–51.
| Are farmers in low-rainfall cropping regions under-fertilising with nitrogen? A risk analysis.Crossref | GoogleScholarGoogle Scholar |
Muschietti-Piana P, McBeath TM, McNeill AM, Cipriotti PA, Gupta VVSR (2020) Combined nitrogen input from legume residues and fertilizer improves early nitrogen supply and uptake by wheat. Journal of Plant Nutrition and Soil Science 183, 355–366.
| Combined nitrogen input from legume residues and fertilizer improves early nitrogen supply and uptake by wheat.Crossref | GoogleScholarGoogle Scholar |
Norton R (2016) Nitrogen management to optimise canola production in Australia. Crop & Pasture Science 67, 419–438.
| Nitrogen management to optimise canola production in Australia.Crossref | GoogleScholarGoogle Scholar |
NVT (2020) Long term yield results. National Variety Trials, Grains Research and Development Corporation, Canberra, ACT. Available at: file:///C:/Users/mcb041/Downloads/GRDC02_HR_Mallee-SA-VIC_Final.pdf (accessed 13 June 2020).
Pan WL, McClellan Maaz T, Ashley Hammac W, McCraken VA, Koenig RT (2016a) Mitscherlich-modeled, semi-arid canola nitrogen requirements influenced by soil nitrogen and water. Agronomy Journal 108, 884–894.
| Mitscherlich-modeled, semi-arid canola nitrogen requirements influenced by soil nitrogen and water.Crossref | GoogleScholarGoogle Scholar |
Pan WL, Young FL, Maz TM, Huggins DR (2016b) Canola integration into semi-arid wheat cropping systems of the inland Pacific Northwestern USA. Crop & Pasture Science 67, 253–265.
| Canola integration into semi-arid wheat cropping systems of the inland Pacific Northwestern USA.Crossref | GoogleScholarGoogle Scholar |
PIRSA (2019) Farm gross margin and enterprise planning guide. Primary Industries and Resources South Australia, Adelaide, S. Aust. Available at: https://pir.sa.gov.au/consultancy/farm_gross_margins_and_enterprise_planning_guide (accessed 26 September 2019).
Probert ME, Dimes JP, Keating BA, Dalal RC, Strong WM (1998) APSIM’s water and nitrogen modules and simulation of the dynamics of water and nitrogen in fallow systems. Agricultural Systems 56, 1–28.
| APSIM’s water and nitrogen modules and simulation of the dynamics of water and nitrogen in fallow systems.Crossref | GoogleScholarGoogle Scholar |
Ramsey BR, Callinan APL (1994) Effects of nitrogen fertiliser on canola production in north central Victoria. Australian Journal of Experimental Agriculture 34, 789–796.
| Effects of nitrogen fertiliser on canola production in north central Victoria.Crossref | GoogleScholarGoogle Scholar |
Rayment GE, Lyons DJ (2011) ‘Soil chemical methods: Australasia.’ (CSIRO Publishing: Melbourne, Vic.)
Roberts P, Moodie M, Wilhelm N (2017) Extending the understanding of break crop sequences in the low rainfall region of south eastern Australia. In ‘Doing more with less. Proceedings 18th Australian Agronomy Conference’. 24–28 September 2017, Ballarat, Vic. (Eds GJ O’Leary, RD Armstrong, L Hafner) (Australian Society of Agronomy) Available at: http://www.agronomyaustraliaproceedings.org/images/sampledata/2017/85_ASA2017_Roberts_Penny_Final.pdf
Robertson MJ, Kirkegaard JA (2005) Water-use efficiency of dryland canola in an equi-seasonal rainfall environment. Australian Journal of Agricultural Research 56, 1373–1386.
| Water-use efficiency of dryland canola in an equi-seasonal rainfall environment.Crossref | GoogleScholarGoogle Scholar |
Robertson MJ, Lilley JM (2016) Simulation of growth, development and yield of canola (Brassica napus) in APSIM. Crop & Pasture Science 67, 332–344.
| Simulation of growth, development and yield of canola (Brassica napus) in APSIM.Crossref | GoogleScholarGoogle Scholar |
Robinson JB, Freebairn DM (2017) Estimating changes in plant available soil water in broadacre cropping in Australia. In ‘Doing more with less. Proceedings 18th Australian Agronomy Conference’. 24–28 September 2017, Ballarat, Vic. (Eds GJ O’Leary, RD Armstrong, L Hafner) (Australian Society of Agronomy) Available at: http://www.agronomyaustraliaproceedings.org/images/sampledata/2017/8_ASA2017_Freebairn_David_Final-L.pdf
Rodriguez D, de Voil P, Hudson D, Brown JN, Hayman P, Marrou H, Meinke H (2018) Predicting optimum crop designs using crop models and seasonal climate forecasts. Nature Scientific Reports 8, 2231
| Predicting optimum crop designs using crop models and seasonal climate forecasts.Crossref | GoogleScholarGoogle Scholar |
Sadras V (2002) Interaction between rainfall and nitrogen fertilisation of wheat in environments prone to terminal drought: economic and environmental risk analysis. Field Crops Research 77, 201–215.
| Interaction between rainfall and nitrogen fertilisation of wheat in environments prone to terminal drought: economic and environmental risk analysis.Crossref | GoogleScholarGoogle Scholar |
Sadras VO (2005) A quantitative top-down view of interactions between stresses: theory and analysis of nitrogen-water co-limitation in Mediterranean agro-ecosystems. Australian Journal of Agricultural Research 56, 1151–1157.
| A quantitative top-down view of interactions between stresses: theory and analysis of nitrogen-water co-limitation in Mediterranean agro-ecosystems.Crossref | GoogleScholarGoogle Scholar |
Sadras VO, Roget DK (2004) Production and environmental aspects of cropping intensification in a semiarid environment of Southeastern Australia. Agronomy Journal 96, 236–246.
Seymour M, Brennan RF (2017) Cultivars of canola respond similarly to applied nitrogen in N-deficient soils of south Western Australia. Journal of Plant Nutrition 40, 2631–2649.
| Cultivars of canola respond similarly to applied nitrogen in N-deficient soils of south Western Australia.Crossref | GoogleScholarGoogle Scholar |
Seymour M, Sprigg S, French B, Bucat J, Malik R, Harries M (2016) Nitrogen responses of canola in low to medium rainfall environments of Western Australia. Crop & Pasture Science 67, 450–466.
| Nitrogen responses of canola in low to medium rainfall environments of Western Australia.Crossref | GoogleScholarGoogle Scholar |
St. Luce M, Grant CA, Zebarth BJ, Ziadi N, O’Donovan JT, Blackshaw RE, Harker KN, Johnson EN, Gan Y, Lafond GP, May WE, Khakbazan M, Smith EG (2015) Legumes can reduce economic optimum nitrogen rates and increase yields in a wheat-canola cropping sequence in western Canada. Field Crops Research 179, 12–25.
| Legumes can reduce economic optimum nitrogen rates and increase yields in a wheat-canola cropping sequence in western Canada.Crossref | GoogleScholarGoogle Scholar |
St. Luce M, Grant CA, Ziadi N, Zebarth BJ, O’Donovan JT, Blackshaw RE, Neil Harker K, Johnson EN, Gan Y, Lafond GP, May WE, Malhi SS, Turkington TK, Lupwayi NZ, McLaren DL (2016) Preceding crops and nitrogen fertilization influence soil nitrogen cycling in no-till canola and wheat cropping systems. Field Crops Research 191, 20–32.
| Preceding crops and nitrogen fertilization influence soil nitrogen cycling in no-till canola and wheat cropping systems.Crossref | GoogleScholarGoogle Scholar |
Ware A, Gontar B, Giles J, Walela CK, Ludwig I, Lilley J, Kirkegaard J, Brill R, McBeath T, Whish J, Moodie M (2017) Canola agronomy and phenology to optimise yield. GRDC Update Papers. Grains Research and Development Corporation, Canberra, ACT. Available at: https://grdc.com.au/resources-and-publications/grdc-update-papers/tab-content/grdc-update-papers/2017/02/canola-agronomy-and-phenology-to-optimise-yield
Whitbread AM, Davoren CW, Gupta VVSR, Llewellyn R, Roget DK (2015) Long-term cropping system studies support intensive and responsive cropping systems in the low-rainfall Australian Mallee. Crop & Pasture Science 66, 553–565.
| Long-term cropping system studies support intensive and responsive cropping systems in the low-rainfall Australian Mallee.Crossref | GoogleScholarGoogle Scholar |
Zhang H, Berger JD, Seymour M, Brill R, Herrmann C, Quinlan R, Knell G (2016) Relative yield and profit of Australian hybrid compared with open-pollinated canola is largely determined by growing-season rainfall. Crop & Pasture Science 67, 323–331.
| Relative yield and profit of Australian hybrid compared with open-pollinated canola is largely determined by growing-season rainfall.Crossref | GoogleScholarGoogle Scholar |
