453 Smooth Brome Canada Seed 800.00 1,200.00 300.00 Roundup value The maximum seed yield (year 1989) of 1240 kg/ha is rounded to 1200 kg/ha. The minimum seed yield (year 1990) of 280 kg/ha is rounded to 300 kg/ha. The mean value of 750 kg/ha is rounded to 800 kg/ha. 1,766