Thanks Rick! I do think I must have spent about an hour and a half on it, and checked my Horticulture Textbook a few times to make sure I had it right. The only thing I am not sure about is if it is proper to leave a space after the x or not, I have seen it both ways. Do you know?
I had some college classes in Botany and Soil Science, but no Horticulture. So a year or so ago I bought some used college textbooks about horticulture etc, I decided as long as I was spending all this time reading I might as well read the "official" stuff as well as all the other excellent books I have. I confess I am a "bookaholic" and an "infoholic" too. And I just ordered some more from the Barnes and Noble used book website...