And of course new varieties are being added all the time.

And just as they had 60 years earlier, new varieties of debt became came an art form.

What new variety of strangers, then, was about to visit them?

He was a new variety, or a dead one, dug up!

At the same time new varieties were introduced to the area.

"We should know in four or five years if we're going to make it with new varieties," he said.

Scientists continue to test to to find new varieties that will work.

The real test comes when he takes home new varieties.

And they check out the new varieties that will be offered next year.

A new "hot" variety seems to appear every few years.