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 areas that get frost, plan on planting out your tomato seedlings 2-3 weeks after your last frost, so you will start growing tomatoes from seed at 4-6 weeks before your last frost date.hile your local nursery may only sell a dozen or two tomato varieties as plants, there are literally hundreds of tomato varieties available as seeds. Starting tomato plants from seeds is easy and requires only a little bit of planning. Letâs take a look at how to start tomato plants from seed.