Amanda Cook (SARDI)
|Contributor||Eyre Peninsula Agricultural Research Foundation|
Site 3, Lock, 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 was undertaken from 2013 to 2015 at Murlong (near Lock) to compare how crop establishment and performance is affected by time of sowing, sowing rate, row position and sowing depth on a non-wetting sand. The trial site was moved in 2016 to another non-wetting site near Lock.
|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 Polkinghorne family for having this trial on their property, and the Hentschke family in previous seasons. 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||23 May 2016|
|Harvest date||8 December 2016|
|Plot size||12m x 2m|
|Paddock history||2016: Kord wheat 2015: Mace wheat 2014: Medic pasture|
|Fertiliser||<p>The trial was sown with CL Kord wheat on 23 May at 30 cm row spacings and into good soil moisture. Base fertiliser was 18:20:0:0 (DAP) @ 60 kg/ha and 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 was also delivered as banded fluid at seeding. Application of 50 kg/ha of urea spread on 6 August</p>|
|Herbicide||<p>The trial was sprayed with a knockdown of 1.5 L/ha of glyphosate, 1.5 L/ha trifluralin, 80 ml/ha of carfentrazone-ethyl and a wetter on 23 May. The whole trial was sprayed with imazepic and imazepyr on 6 of July</p>|
|Rainfall avg ann (mm)||336mm|
|Rainfall avg gsr (mm)||250mm|
|Rainfall trial total (mm)||401mm|
|Rainfall trial gsr (mm)||314mm|
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.