Melanie Kupsch (DAFWA)
Anne Smith (DAFWA)
Christine Zaicou-Kunesch (DAFWA)
|Contributor||North East Farming Futures|
Mullewa Research Annex, WA
To improve crop production by determining the effect of sowing time and sowing rate on crop yield and grain quality risks of new wheat varieties.
Sowing time has a greater influence on production of all wheat varieties than seeding rate. Weed competition is one factor which can limit early sowing and increasing crop competition through increasing plant density has been demonstrated as a useful non chemical tool to reduce weed growth. The research has demonstrated that increasing plant density did not adversely affect crop yield or grain quality of crops sown close to the break of the season in May however higher plant densities of varieties sown in June did reduce yield of wheat varieties.There was no influence of seeding rate on crop production in 2012 at Mullewa when the crop was sown close to the break. However there was a yield penalty with the higher seeding rate when the sowing time was delayed by a month. These results are in contrast to 2011 at Mullewa. Increasing seeding rate increased crop production when sown close to the break and there was no effect on production with increasing seeding rate when seeding was delayed.
|Lead research organisation||N/A|
|Host research organisation||
Mullewa Farm Improvement Group
|Trial funding source||Mallee CMA|
Tactical Break Crop Agronomy
|Other trial partners||North East Farming Futures|
|Sow rate or Target density||100, 200 and 300 plants/m2|
|Sow date||11 May 2012 11 May and 7 June 2012|
|Harvest date||Not specified|
|Plot size||20m x 1.54m|
TOS 1: 11 May, 80 kg/ha Agras Xtra drilled with seed + 60 kg/ha Urea topdressed.
|Rainfall trial gsr (mm)||100.4mm|
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.