Increasing wheat yields in a high rainfall area of Western Australia
1990
Anderson, W.K. (Western Australian Dept. of Agriculture, South Perth) | Smith, W.R. (Esperance Agricultural Centre, Esperance (Australia))
Factorial experiments with mid and long season cultivars (Aroona and Osprey), 2 levels of applied N (40 and 80 kg N per ha), 2 seed rates (50 and 100 kg per ha) and with or without fungicide were conducted at 8 sites over 2 seasons. Largest grain yields were obtained where wheat followed a grass-free break crop, and the mid season cultivar was used with 80 kg N per ha and 100 kg per ha of seed. Increases due to cultivar and seed rate were more consistent than those due to N, and increases from application of fungicide were less consistent. It is suggested that the optimal wheat production scheme will include sowing in May in rotation with a grass-free break crop, seed rate of about 100 kg per ha and, when all other factors are optimal, N rates of over 40 kg per ha.
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