Grains and field crops
Comments on results - Of the four time of planting trials two definitely showed superiority of earlier seeding (73BA5, 73E6). The two trials in the Southwest (73BR14 and 73MT7) gave highest yields with June sowing compared to May. Three trials (73BR14, 73E6 and 73BA5) appear to have a Variety x Time interaction for plant density, but no definite trend for either Uniharvest or Unicrop although later sowing reduced plant density. Seeding rates in excess of 82 kg/ha gave the highest yields in all trials. The rate of seeding experiments (73BA5 and 73MT7) show that the best crop density for yield (graph) lies between 8 and 10 plants per metre row, which is consistent with the 1971 work. 73BR14, 73JE25, 73BA5, 73E6, 73MT7.
Number of Pages
Walton, G. (1973), 1973 Time of planting and rate of seeding on lupin yield. Department of Agriculture and Food, Western Australia, Perth. Report.