Turnip greens can be picked when young and tender, and lightly steamed to eat. The root is best picked when 5 to 8 cm [2-3"] in diameter. They are susceptible to cut worms and maggots.Approximately 350 seeds/gram.
Hints:

Sow 2 seeds / cm [5 seeds / inch] in furrows 1 cm [1/2"] deep and 20 cm [12"] apart.

Thin to 5 cm [2"].

American Flag, also called Rutabaga. An excellent table variety and good keeper. 12 - 14 cm (5 - 5.5") globe shaped roots with smooth yellow skin, purple above ground, and crisp yellow flesh. Approximate Seeds Per Gram - 400. Seeding Rate - 20 grams per 100 ft row, or 1 kg per acre.