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Effect of row spacing, nitrogen and weed control on crop and weed in low rainfall zones of western Australia

Hashem, A., Vance, W., Brennan, R. and Bell, R.W. (2017) Effect of row spacing, nitrogen and weed control on crop and weed in low rainfall zones of western Australia. In: Haque ME, Bell RW, Vance WH (eds) Proceedings of the 2nd Conference on Conservation Agriculture for Smallholders (CASH-II), 14 - 16 February, Mymensingh, Bangladesh pp. 152-153.

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Abstract

Wide rows essentially ensure some temporal and spatial water availability in water-limiting crop environments, thus minimising the risk of water deficits at critical crop growth stages to ensure profitable yields (Whish et al., 2005). Presence of weeds will have a major impact on water availability to crops irrespective of planting geometries. Decreasing crop plant population and increasing row spacing decreases crop competitive ability against weeds, and generally wider row spacing will reduce crop competition for homogeneously distributed production factors, as postulated mathematically by Fischer and Miles, (1973). Hence good weed management becomes critical to the success of wide row systems, as failure to control water-using weeds defeats the purpose of wide row cropping where water conservation is the focus. With a perceived decline in rainfall in central and eastern wheat belt of Western Australia (WA), wide row cropping practices may prove more productive if weeds can be managed by appropriate herbicides and depriving weeds from applied nitrogen (N). We examined the effect of nitrogen and herbicide on the crop performance and weed control under normal and wide row spacing in a wheat – lupin– canola rotation at Cunderdin and wheat – chickpea rotation at Merredin, WA.

Publication Type: Conference Paper
Murdoch Affiliation: School of Veterinary and Life Sciences
UNSD Goals: Goal 12: Responsible Consumption and Production
URI: http://researchrepository.murdoch.edu.au/id/eprint/36844
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