The Ukraine Geography Question?

Doug only has half the answer. Ukraine has 1/4 of all the black soil in the world. That richness means that the ground is extremely fertile. However, it is so far north that the growing season is not very good for the earliest strains of Middle Eastern domesticated wheat. Ukrainian farmers developed a strain of wheat that could grow in a shorter season and over colder winters. It was this hard red "Russian" wheat, developed in Ukraine, that the farmers on the Great Plains of the U.S. found was the perfect strain of wheat to grow in America. Thus, Ukrainian wheat, already a very important crop in Europe, became a very important crop in America, accounting for the majority of American wheat export as well as the entirety of the Ukrainian wheat export. So two of the most fertile regions of the world are growing the same strain of Ukrainian wheat.