There were no differences in yield for plant populations of 20, 40 and 60 plants/m2 and row spacing's of 18, 22 and 30 cm at yield levels of around 3 t/ha at Cootamundra... There were no differences in yield for row spacing's of 18, 24 and 36 cm at yield levels up to 3.8 t/ha at Wagga Wagga... Technology to reduce spray drift GCTV: Drift Reducing Technology..
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Relationship between growth stage and accumulated uptake of nitrogen by a wheat crop, expressed as a percentage of the total uptake... Optimising N supply is difficult in western regions given the highly variable seasons. Excessive application of N may increase water use early in the growing season leading to greater water stress during flowering and grain fill, resulting in poor grain set or shrivelled grain... There was no significant effect of N rate on grain yield but the effect on protein was significant with protein increasing with rates of applied N. As for the sowing time trial, there was a negative correlation between grain yield and grain protein concentration, and Gregory did not differ from other varieties...
Excessive application of N may increase susceptibility of the crop to disease and increase water use early in the growing season whereas insufficient application may limit grain yield, grain protein and subsequent profitability... As part of the GRDC funded VSAP project, five nitrogen use efficiency trials were conducted in 2011 at Trangie, Condobolin, Parkes, Coonamble and Spring Ridge, as well as a sowing time trial at Trangie, with these trials used in this paper to assess the grain yield and grain protein concentration of several commercial wheat varieties... N application increased the protein of all the varieties, with protein increases being recorded up to 160 kg/ha of applied N...