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 pH of the soil can be adjusted to make sure that soil nutrients are available. Most native soils in Arkansas are acidic and need to be amended with lime to raise the soil pH. The vegetable garden should be slightly acidic with a pH level ranging from 5.8 to 6.8. Lime takes 6 to 8 weeks to alter soil pH and should be applied in the fall or late winter.