Effect of sowing rate and sowing date on lupin seed yield

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Abstract
Trials were carried out with Lupinus angustifolius cv. ‘Uniharvest’ sown in autumn and spring at five sowing rates. The spring-sown trial included L. luteus cv. ‘Weiko III’ at four sowing rates. Autumn sowing produced the highest yields, and ‘Weiko III’ yielded substantially less than spring-sown ‘Uniharvest’. The optimum sowing rates demonstrated by the results were higher than the rates currently being recommended. Yield component analysis showed that numbers of seeds per pod and 100-seed weight were not generally affected by sowing rate or sowing date. Autumn sowing greatly increased the numbers of lateral branches.