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.
Arkansas becomes quite sultry in summertime, as tropical air streams in from the Gulf of Mexico. The statewide average high temperature in the hottest months of the year, July and August, hovers in the low 90s Fahrenheit, and highs can occasionally reach into the triple digits. Overnight lows dip only into the low 70s.