Managing dryland wheat for maximum yield potential – Tamarang 2014

Abstract

Key findings • Results from this study, clearly demonstrated that sowing timing is important. For example, delayed sowing (30 June vs 9 May) reduced the grain yield potential for EGA Gregory[PBR] by 1.75 t/ha or ~24%. • Agronomic management factors that affected yield potential from the early sowing time (9 May) included response to nitrogen (N) input (~9% variation), with genotype and crown rot disease pressure both individually accounting for ~8% variations in grain yield. • When the time of sowing was delayed to 30 June, agronomic factors had a larger impact/variation on grain yield potential. With both genotype (variety selection) and crown rot disease pressure responsible for a 13% variation/decline in grain yield. • Delayed sowing also affected yield response to N with no increase in grain yield potential due to N input, whilst targeted plant population affected grain yield, with the low population treatment accounting for ~9%.