Amanda Cook, Wade Shepperd and Ian Richter (SARDI)
|Contributor||Eyre Peninsula Agricultural Research Foundation|
Site 1, Murlong, SA
The GRDC project ‘Maintaining profitable farming systems with retained stubble - upper Eyre Peninsula’ aims to produce sustainable management guidelines to control pests, weeds and diseases while retaining stubble to maintain or improve soil health, and reduce exposure to wind erosion. The major outcome to be achieved is increased knowledge and skills allowing farmers and advisers to improve farm profitability while retaining stubble in farming systems on upper Eyre Peninsula (EP).
One issue EP farmers identified as a problem with stubble retained systems was sowing into non-wetting sands and the resulting uneven and reduced germination. A trial at Murlong (near Lock) was established in 2013 to compare how crop establishment is affected by time of sowing, sowing rate, and seed position and depth on a non-wetting sand and crop performance. The trial has been re-seeded in the 2014 and 2015 growing seasons.
|Lead research organisation||
Eyre Peninsula Agricultural Research Foundation
|Host research organisation||
SARDI Minnipa Agricultural Centre
|Trial funding source||GRDC EPF00001|
Maintaining profitable farming systems with retained stubble
Thank you to the Hentschke family for having this trial on their property. Trial funded by GRDC Maintaining profitable farming systems with retained stubble - upper Eyre Peninsula (EPF00001).
|Other trial partners||Not specified|
|Sow rate or Target density||40kg/ha, 60 kg/ha|
|Sow date||18 May 2015|
|Harvest date||19 November 2015|
|Plot size||12m x 2m|
|Paddock history||2014: Scope barley, 2013: Kord wheat|
60 kg/ha of DAP and 50 kg/ha of ammonium sulphate. A trace element mix of manganese sulphate at 1.5 kg Mn/ha, zinc sulphate at 1 kg Zn/ha and copper sulphate at 0.2 kg Cu/ha were also delivered as a fluid at seeding. Extra urea was broadcast on all plots on 10 August @ 40 kg/ha.
The trial was sprayed with a knockdown of 1L/ha of Roundup Powermax, 1.5 L/ha Avadex and 1.5 L/ha Treflan on 18 May. The trial was also sprayed with 750 ml/ha Tigrex and 100 ml/ha Lontrel on 10 August.
||Late dry matter (kg/m2)||Screenings (%)||Yield (t/ha)||Plant Establishment (plants/m2)||Harvest Index (2015)||Protein (%)||Test weight (kg/hL)|
|1||█ Placement on-row||0.43||10.4||0.58||95.4||0.38||11.7||75.8|
|2||█ Placement inter-row||0.41||8.4||0.55||56.3||0.39||11.8||76.6|
|3||█ Depth 0-1 cm||0.4||10||0.57||78.2||0.38||11.7||76.1|
|4||█ Depth 3-4 cm||0.44||8.8||0.56||73.5||0.39||11.7||76.3|
|5||█ Sowing rate 40 kg/ha||0.42||9.4||0.56||62.7||0.38||11.7||76.4|
|6||█ Sowing rate 60 kg/ha||0.42||9.4||0.57||88.9||0.39||11.7||76|
|Rainfall avg ann (mm)||336mm|
|Rainfall avg gsr (mm)||250mm|
|Rainfall trial total (mm)||294mm|
|Rainfall trial gsr (mm)||229mm|
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.