Effects of plant density and sowing date on grain yield of faba beans (Vicia faba L.) in northern New South Wales

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Abstract
The effects of varying plant density and sowing date on grain yield of faba beans (Vicia faba L.) were determined in 6 experiments at Tamworth and Narrabri in northern New South Wales. The graph of grain yield rose to an asymptote as plant density was increased. Under conditions favouring high yields, a plant density of 20 m-2 gave near maximum grain yields, but for a wider range of circumstances a plant density of 30-35 m-2 was appropriate. If sowing was delayed after the end of April, grain yield was reduced as was dry matter yield and the duration of pod-filling. Late sowing also lowered the height of the first pod above ground, and increased the likelihood of yield loss through foliar disease.

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