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.
Preparation. Many gardeners buy tomato seedlings from a nursery. This is the most convenient method, since these plants are ready to plant immediately. You can also start from seed, in which case you can start six to eight weeks before the recommended planting date in your part of the state.omato vine image by Horticulture from Fotolia.com. Tomatoes are among the most widely planted home vegetables in Oklahoma. High yielding and easy to grow, tomatoes survive in a wide range of conditions, but they should be planted at the right time for the best chances of a healthy, productive crop.