Fabio Arsego (SARDI), Andrew Ware (SARDI)
|Contributor||SARDI Minnipa Agricultural Centre|
On the upper Eyre Peninsula (UEP), calcareous soils constitute a high proportion (more than 1 million hectares) of soils used for agricultural production (Bertrand et al. 2003). The website ‘Yield Gap Australia’ (http://yieldgapaustralia.com.au/maps/) identifies that the average grain yield on western Eyre Peninsula (WEP) and UEP is between 41 and 45% of the water limited yield potential (1.5 t/ha for WEP and 1.8 t/ha for UEP). Closing the grain yield gap for wheat on UEP presents a challenge to growers mostly due to nutrient deficiencies, particularly on calcareous soils (Holloway et al. 2001). The majority of landholders in the western and upper Eyre Peninsula currently use granular fertilisers, which require good soil moisture conditions to enable uptake of nutrients. Limitations of water availability during the growing season influences grower decisions regarding fertiliser applications, with associated impacts on crop profitability. Consequently, growers often apply lower rates of nutrients than are required to achieve the water limiting yield potential as a risk management strategy (Sadras and Roget 2004; Monjardino et al. 2013). A deeper understanding of the multiple factors influencing the efficacy of applied granular fertilisers such as fertiliser position in relation to seed, fertiliser composition and soil structure and moisture can be used to develop alternative strategies for increasing the effectiveness of fertiliser applications (McLaughlin et al. 2011). This study aimed to determine the impact of different fertiliser products and placement relative to the seed on crop emergence, crop WUE and grain yield.
|Lead research organisation||
South Australian Research and Development Institute
|Host research organisation||N/A|
|Trial funding source||GRDC DAS00157|
The present project is part of the bilateral investment initiative between SARDI and GRDC (scope study DAS00157). Special thanks to John Montgomerie and Tim Howard for providing the field trial sites at Piednippie and Nunjikompita. Thank you to Brenton Spriggs, Sue Budarick and Katherina for their collaboration with field activities. Thank you to Brett Masters, Prof. Glenn McDonald and Helena Oakey for reviewing the article.
|Other trial partners||Not specified|
|Sow rate or Target density||60 kg/ha (Normal seeding rate) and 80 kg/ha (High seeding rate)|
|Sow date||8 June 2018|
|Harvest date||5 December 2018|
|Plot size||10m x 1.6m|
|Plot blocking||randomised complete block design|
|Plot randomisation||randomised complete block design|
50 kg/ha Di Ammonium Phosphate (DAP), 50 kg/ha Mono Ammonium Phosphate (MAP), 50 kg/ha Urea, 100 kg/ha Triple Super Phosphate (TSP), 200 kg/ha Single Super Phosphate (SSP), 200 kg/ha Complete Nutrient Mix
See article for treatments
Boxer gold @ 1.5 L/ha, Avadex @ 1.5 L/ha, Roundup @ 2 L/ha, Hammer @ 1.6 L/ha, Broadstrike @ 800 ml/ha (5/6/18 Nunjikompita, 8/5/18 Piednippie)
|Rainfall avg ann (mm)||299mm|
|Rainfall avg gsr (mm)||225mm|
|Rainfall trial total (mm)||168mm|
|Rainfall trial gsr (mm)||128mm|
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.