428 Zig-zag Clover Canada Seed 40.00 Roundup value The article mentioned that the species occurs in isolated areas in uncultivated pastures in Eastern Canada. The yield is based on average of seed yields in Zigzag clover selections ( year 1960). The value of 34.2 pound/acre converted into 38.33 kg/ha (rounded to 40 kg/ha). 1,678