Sunflower
populations. Trials in eastern North Dakota show increases in yields with densities up to
29,000 plants/acre, but most studies have shown less effect of seeding rate. Higher
densities are often recommended for irrigated or high rainfall areas.
Table 2: Effect of plant population on yield and yield components - average of 12
trials in Minnesota
Plant density Seed yield Seed number Seed weight Large seedl Oil content Lo
heads/acre lbs/acre seeds/head mg/seed % % sc
14,970 2,004 831 73 52 42.1
19,830 2,131 727 67 44 43.2
25,090 2,169 632 62 33 43.2
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