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.
For example, seeds started in mid-March should be ready for the garden by May 1, according to Ross Penhallegon, horticulturist with the Oregon State University Extension Service. No matter where you are in Oregon, tomato, pepper and eggplant require six to eight weeks from seeding to transplanting.