I'd guess that'd be the orientation that the photographer decided to snap the picture. As far as north and south, it would be interesting to know wouldn't it?
The crop formation is pictured on the left, above. The depiction on the right is one version of the ancient Tree of Life. The Tree of Life, of course, is mentioned many times in the Bible, from the beginning of the Book of Genesis to last part of the Book of Revelation. One who eats from this Tree, according to the Bible, is given "eternal life." The above diagram of the Tree of Life is part of an ancient tradition called "Kabala." Other spellings of the word include, kabbala, cabala, cabbala, quabala, and qabbalah. This is generally known as a special Hebrew tradition, the occult philosophy of certain Jewish rabbis, especially in the Middle Ages, based on a mystical interpretation of the Scriptures. Many scholars believe that the tradition is much older; that it traces back to the ancient Egyptians and Sumerians.