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.
The earliest safe planting date for tomato plants is April 20 in western Kentucky, May 5 in central Kentucky and May 15 in eastern Kentucky. The earliest planting date for cucumbers is April 20 in the west, May 1 in the central part of the state, May 10 in the east.