For example, an individual can be AB, D positive, and at the same time M and N positive (MNS system), K positive (Kell system), Lea or Leb negative (Lewis system), and so on, being positive or negative for each blood group system antigen.
Nearly every list of easy-to-grow vegetables starts with lettuce, and with good reason: so long as you plant it at the right time, it will grow from seed with little attention. The right time is when the soil is cool, in the spring and fall. In Arkansas, you can plant lettuce seeds from February to April, and again in September for a fall harvest.
How to Plant. To start tomatoes indoors, sow seeds using expanding seed starting soil pods about 8 weeks before the last frost date for your area. Seedlings will be spindly with less than 12-14 hours of light per day, try to keep them in a warm sunny location.