Okay, I have no idea what this mean, but a crocheting friend of mine thinks this is the bee's knees for crocheters everywhere, so I'm passing it along:

With most afghans that run back-and-forth (in contrast to the concentric type), the base row can be inflexible compared to the rest of the afghan, which results in one end (usually the on shorter sides) being a consistent length and the opposite side getting longer as the afghan is stretched or pulled as it ages. I had about 10 rows done when I realized the base row was too tight, and I experimented and figured out a way to make the base row and the first row at the same time, and make it as flexible/stretchy as the rest of the crocheting. One small step for me, one giant leap for crocheters everywhere. I should publish this technique somewhere.

[Here's the the technique]
chain 4, yarn over, insert hook in first chain stitch, yarn over, pull through a loop. Yarn over and pull through the last loop, then yarn over and pull through the last loop (two chain stitches on the end of the hook), then yarn over and finish like a normal double crochet: pull through two loops, yarn over and pull through two loops. For the next stitch, yarn over, insert hook in the second chain stitch at the bottom of the previous eccentric double crochet, pull through a loop, do the two chain stitches at the end of the hook, then complete the double crochet.

Got that? Good! Now someone explain it to me! On second thought, don't bother. :-)